Finding the Third Proportional to 64,387.50 and 99,696.75

Step by Step Solution

1. Step 1: Write the proportion equation
   64,387.50 : 99,696.75 = 99,696.75 : x
2. Step 2: Convert to fraction form
   64,387.50/99,696.75 = 99,696.75/x
3. Step 3: Cross multiply
   64,387.50x = 99,696.75 × 99,696.75
4. Step 4: Simplify right side
   64,387.50x = 9,939,441,960.56
5. Step 5: Solve for x
   x = 9,939,441,960.56/64,387.50
6. Step 6: Final answer
   x = 154,369.12