Finding the Third Proportional to 66,517 and 90,475.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,517 : 90,475.50 = 90,475.50 : x
2. Step 2: Convert to fraction form
   66,517/90,475.50 = 90,475.50/x
3. Step 3: Cross multiply
   66,517x = 90,475.50 × 90,475.50
4. Step 4: Simplify right side
   66,517x = 8,185,816,100.25
5. Step 5: Solve for x
   x = 8,185,816,100.25/66,517
6. Step 6: Final answer
   x = 123,063.52