Finding the Fourth Proportional to 90,301.32, 124,620.28 and 54,490.72

Step by Step Solution

1. Step 1: Write the proportion equation
   90,301.32 : 124,620.28 = 54,490.72 : x
2. Step 2: Convert to fraction form
   90,301.32/124,620.28 = 54,490.72/x
3. Step 3: Cross multiply
   90,301.32x = 124,620.28 × 54,490.72
4. Step 4: Simplify right side
   90,301.32x = 6,790,648,783.80
5. Step 5: Solve for x
   x = 6,790,648,783.80/90,301.32
6. Step 6: Final answer
   x = 75,199.88