Finding the Third Proportional to 31,900,646 and 69,977,326

Step by Step Solution

1. Step 1: Write the proportion equation
   31,900,646 : 69,977,326 = 69,977,326 : x
2. Step 2: Convert to fraction form
   31,900,646/69,977,326 = 69,977,326/x
3. Step 3: Cross multiply
   31,900,646x = 69,977,326 × 69,977,326
4. Step 4: Simplify right side
   31,900,646x = 4,896,826,154,110,276
5. Step 5: Solve for x
   x = 4,896,826,154,110,276/31,900,646
6. Step 6: Final answer
   x = 153,502,413.53