Finding the Third Proportional to 64,087.88 and 99,490.78

Step by Step Solution

1. Step 1: Write the proportion equation
   64,087.88 : 99,490.78 = 99,490.78 : x
2. Step 2: Convert to fraction form
   64,087.88/99,490.78 = 99,490.78/x
3. Step 3: Cross multiply
   64,087.88x = 99,490.78 × 99,490.78
4. Step 4: Simplify right side
   64,087.88x = 9,898,415,553.74
5. Step 5: Solve for x
   x = 9,898,415,553.74/64,087.88
6. Step 6: Final answer
   x = 154,450.68