Finding the Third Proportional to 58,471.88 and 90,502.31

Step by Step Solution

1. Step 1: Write the proportion equation
   58,471.88 : 90,502.31 = 90,502.31 : x
2. Step 2: Convert to fraction form
   58,471.88/90,502.31 = 90,502.31/x
3. Step 3: Cross multiply
   58,471.88x = 90,502.31 × 90,502.31
4. Step 4: Simplify right side
   58,471.88x = 8,190,668,567.85
5. Step 5: Solve for x
   x = 8,190,668,567.85/58,471.88
6. Step 6: Final answer
   x = 140,078.77