Finding the Third Proportional to 66,514.50 and 90,471.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,514.50 : 90,471.50 = 90,471.50 : x
2. Step 2: Convert to fraction form
   66,514.50/90,471.50 = 90,471.50/x
3. Step 3: Cross multiply
   66,514.50x = 90,471.50 × 90,471.50
4. Step 4: Simplify right side
   66,514.50x = 8,185,092,312.25
5. Step 5: Solve for x
   x = 8,185,092,312.25/66,514.50
6. Step 6: Final answer
   x = 123,057.26