Finding the Fourth Proportional to 78,321.10, 108,083.25 and 42,511.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,321.10 : 108,083.25 = 42,511.12 : x
2. Step 2: Convert to fraction form
   78,321.10/108,083.25 = 42,511.12/x
3. Step 3: Cross multiply
   78,321.10x = 108,083.25 × 42,511.12
4. Step 4: Simplify right side
   78,321.10x = 4,594,740,010.74
5. Step 5: Solve for x
   x = 4,594,740,010.74/78,321.10
6. Step 6: Final answer
   x = 58,665.42