Finding the Fourth Proportional to 78,464.59, 108,279.86 and 42,655.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,464.59 : 108,279.86 = 42,655.50 : x
2. Step 2: Convert to fraction form
   78,464.59/108,279.86 = 42,655.50/x
3. Step 3: Cross multiply
   78,464.59x = 108,279.86 × 42,655.50
4. Step 4: Simplify right side
   78,464.59x = 4,618,731,354.95
5. Step 5: Solve for x
   x = 4,618,731,354.95/78,464.59
6. Step 6: Final answer
   x = 58,863.90