Finding the Fourth Proportional to 59,415.12, 89,007.30 and 53,105.76

Step by Step Solution

1. Step 1: Write the proportion equation
   59,415.12 : 89,007.30 = 53,105.76 : x
2. Step 2: Convert to fraction form
   59,415.12/89,007.30 = 53,105.76/x
3. Step 3: Cross multiply
   59,415.12x = 89,007.30 × 53,105.76
4. Step 4: Simplify right side
   59,415.12x = 4,726,800,312.05
5. Step 5: Solve for x
   x = 4,726,800,312.05/59,415.12
6. Step 6: Final answer
   x = 79,555.51