Finding the Third Proportional to 64,207.13 and 99,807.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,207.13 : 99,807.75 = 99,807.75 : x
2. Step 2: Convert to fraction form
   64,207.13/99,807.75 = 99,807.75/x
3. Step 3: Cross multiply
   64,207.13x = 99,807.75 × 99,807.75
4. Step 4: Simplify right side
   64,207.13x = 9,961,586,960.06
5. Step 5: Solve for x
   x = 9,961,586,960.06/64,207.13
6. Step 6: Final answer
   x = 155,147.69