Finding the Third Proportional to 611,447,538,948.72 and 911,868,904,779.72

Step by Step Solution

1. Step 1: Write the proportion equation
   611,447,538,948.72 : 911,868,904,779.72 = 911,868,904,779.72 : x
2. Step 2: Convert to fraction form
   611,447,538,948.72/911,868,904,779.72 = 911,868,904,779.72/x
3. Step 3: Cross multiply
   611,447,538,948.72x = 911,868,904,779.72 × 911,868,904,779.72
4. Step 4: Simplify right side
   611,447,538,948.72x = 831,504,899,504,166,022,414,336
5. Step 5: Solve for x
   x = 831,504,899,504,166,022,414,336/611,447,538,948.72
6. Step 6: Final answer
   x = 1,359,895,733,546.98