Finding the Fourth Proportional to 59,856.84, 89,257.20 and 56,913.61

Step by Step Solution

1. Step 1: Write the proportion equation
   59,856.84 : 89,257.20 = 56,913.61 : x
2. Step 2: Convert to fraction form
   59,856.84/89,257.20 = 56,913.61/x
3. Step 3: Cross multiply
   59,856.84x = 89,257.20 × 56,913.61
4. Step 4: Simplify right side
   59,856.84x = 5,079,949,470.49
5. Step 5: Solve for x
   x = 5,079,949,470.49/59,856.84
6. Step 6: Final answer
   x = 84,868.32