Finding the Fourth Proportional to 72,088.78, 108,056.62 and 42,520.54

Step by Step Solution

1. Step 1: Write the proportion equation
   72,088.78 : 108,056.62 = 42,520.54 : x
2. Step 2: Convert to fraction form
   72,088.78/108,056.62 = 42,520.54/x
3. Step 3: Cross multiply
   72,088.78x = 108,056.62 × 42,520.54
4. Step 4: Simplify right side
   72,088.78x = 4,594,625,832.97
5. Step 5: Solve for x
   x = 4,594,625,832.97/72,088.78
6. Step 6: Final answer
   x = 63,735.66