Finding the Fourth Proportional to 157,470.72, 217,301.04 and 90,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   157,470.72 : 217,301.04 = 90,402.72 : x
2. Step 2: Convert to fraction form
   157,470.72/217,301.04 = 90,402.72/x
3. Step 3: Cross multiply
   157,470.72x = 217,301.04 × 90,402.72
4. Step 4: Simplify right side
   157,470.72x = 19,644,605,074.83
5. Step 5: Solve for x
   x = 19,644,605,074.83/157,470.72
6. Step 6: Final answer
   x = 124,750.84