Finding the Fourth Proportional to 78,566.80, 108,419.92 and 42,756

Step by Step Solution

1. Step 1: Write the proportion equation
   78,566.80 : 108,419.92 = 42,756 : x
2. Step 2: Convert to fraction form
   78,566.80/108,419.92 = 42,756/x
3. Step 3: Cross multiply
   78,566.80x = 108,419.92 × 42,756
4. Step 4: Simplify right side
   78,566.80x = 4,635,602,099.52
5. Step 5: Solve for x
   x = 4,635,602,099.52/78,566.80
6. Step 6: Final answer
   x = 59,002.05