Finding the Fourth Proportional to 78,511.62, 108,346.59 and 42,702.78

Step by Step Solution

1. Step 1: Write the proportion equation
   78,511.62 : 108,346.59 = 42,702.78 : x
2. Step 2: Convert to fraction form
   78,511.62/108,346.59 = 42,702.78/x
3. Step 3: Cross multiply
   78,511.62x = 108,346.59 × 42,702.78
4. Step 4: Simplify right side
   78,511.62x = 4,626,700,596.52
5. Step 5: Solve for x
   x = 4,626,700,596.52/78,511.62
6. Step 6: Final answer
   x = 58,930.14