Finding the Fourth Proportional to 78,321.60, 108,083.94 and 42,511.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,321.60 : 108,083.94 = 42,511.62 : x
2. Step 2: Convert to fraction form
   78,321.60/108,083.94 = 42,511.62/x
3. Step 3: Cross multiply
   78,321.60x = 108,083.94 × 42,511.62
4. Step 4: Simplify right side
   78,321.60x = 4,594,823,385.38
5. Step 5: Solve for x
   x = 4,594,823,385.38/78,321.60
6. Step 6: Final answer
   x = 58,666.11