Finding the Third Proportional to 64,788,475.50 and 91,673,691.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,788,475.50 : 91,673,691.75 = 91,673,691.75 : x
2. Step 2: Convert to fraction form
   64,788,475.50/91,673,691.75 = 91,673,691.75/x
3. Step 3: Cross multiply
   64,788,475.50x = 91,673,691.75 × 91,673,691.75
4. Step 4: Simplify right side
   64,788,475.50x = 8,404,065,759,074,018
5. Step 5: Solve for x
   x = 8,404,065,759,074,018/64,788,475.50
6. Step 6: Final answer
   x = 129,715,442.36