Finding the Fourth Proportional to 78,340.98, 108,111.33 and 42,531.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,340.98 : 108,111.33 = 42,531.30 : x
2. Step 2: Convert to fraction form
   78,340.98/108,111.33 = 42,531.30/x
3. Step 3: Cross multiply
   78,340.98x = 108,111.33 × 42,531.30
4. Step 4: Simplify right side
   78,340.98x = 4,598,115,409.63
5. Step 5: Solve for x
   x = 4,598,115,409.63/78,340.98
6. Step 6: Final answer
   x = 58,693.62