Finding the Third Proportional to 12,113,071.50 and 18,618,619.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,113,071.50 : 18,618,619.50 = 18,618,619.50 : x
2. Step 2: Convert to fraction form
   12,113,071.50/18,618,619.50 = 18,618,619.50/x
3. Step 3: Cross multiply
   12,113,071.50x = 18,618,619.50 × 18,618,619.50
4. Step 4: Simplify right side
   12,113,071.50x = 346,652,992,085,780.25
5. Step 5: Solve for x
   x = 346,652,992,085,780.25/12,113,071.50
6. Step 6: Final answer
   x = 28,618,091.79