Finding the Fourth Proportional to 90,016.11, 134,856.50 and 56,292.57

Step by Step Solution

1. Step 1: Write the proportion equation
   90,016.11 : 134,856.50 = 56,292.57 : x
2. Step 2: Convert to fraction form
   90,016.11/134,856.50 = 56,292.57/x
3. Step 3: Cross multiply
   90,016.11x = 134,856.50 × 56,292.57
4. Step 4: Simplify right side
   90,016.11x = 7,591,418,684.74
5. Step 5: Solve for x
   x = 7,591,418,684.74/90,016.11
6. Step 6: Final answer
   x = 84,334.00