Finding the Fourth Proportional to 78,391.19, 108,180.56 and 42,581.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,391.19 : 108,180.56 = 42,581.50 : x
2. Step 2: Convert to fraction form
   78,391.19/108,180.56 = 42,581.50/x
3. Step 3: Cross multiply
   78,391.19x = 108,180.56 × 42,581.50
4. Step 4: Simplify right side
   78,391.19x = 4,606,490,351.64
5. Step 5: Solve for x
   x = 4,606,490,351.64/78,391.19
6. Step 6: Final answer
   x = 58,762.86