Finding the Third Proportional to 639,899,980.50 and 955,656,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   639,899,980.50 : 955,656,760.50 = 955,656,760.50 : x
2. Step 2: Convert to fraction form
   639,899,980.50/955,656,760.50 = 955,656,760.50/x
3. Step 3: Cross multiply
   639,899,980.50x = 955,656,760.50 × 955,656,760.50
4. Step 4: Simplify right side
   639,899,980.50x = 913,279,843,889,354,368
5. Step 5: Solve for x
   x = 913,279,843,889,354,368/639,899,980.50
6. Step 6: Final answer
   x = 1,427,222,803.13