Finding the Third Proportional to 66,280.50 and 99,695.25

Step by Step Solution

1. Step 1: Write the proportion equation
   66,280.50 : 99,695.25 = 99,695.25 : x
2. Step 2: Convert to fraction form
   66,280.50/99,695.25 = 99,695.25/x
3. Step 3: Cross multiply
   66,280.50x = 99,695.25 × 99,695.25
4. Step 4: Simplify right side
   66,280.50x = 9,939,142,872.56
5. Step 5: Solve for x
   x = 9,939,142,872.56/66,280.50
6. Step 6: Final answer
   x = 149,955.76