Finding the Fourth Proportional to 78,599.16, 108,282.42 and 54,684.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,599.16 : 108,282.42 = 54,684.72 : x
2. Step 2: Convert to fraction form
   78,599.16/108,282.42 = 54,684.72/x
3. Step 3: Cross multiply
   78,599.16x = 108,282.42 × 54,684.72
4. Step 4: Simplify right side
   78,599.16x = 5,921,393,818.62
5. Step 5: Solve for x
   x = 5,921,393,818.62/78,599.16
6. Step 6: Final answer
   x = 75,336.60