Finding the Fourth Proportional to 78,417.91, 108,216.50 and 42,608.05

Step by Step Solution

1. Step 1: Write the proportion equation
   78,417.91 : 108,216.50 = 42,608.05 : x
2. Step 2: Convert to fraction form
   78,417.91/108,216.50 = 42,608.05/x
3. Step 3: Cross multiply
   78,417.91x = 108,216.50 × 42,608.05
4. Step 4: Simplify right side
   78,417.91x = 4,610,894,042.83
5. Step 5: Solve for x
   x = 4,610,894,042.83/78,417.91
6. Step 6: Final answer
   x = 58,798.99