Finding the Fourth Proportional to 78,651.80, 108,541.40 and 42,843.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,651.80 : 108,541.40 = 42,843.72 : x
2. Step 2: Convert to fraction form
   78,651.80/108,541.40 = 42,843.72/x
3. Step 3: Cross multiply
   78,651.80x = 108,541.40 × 42,843.72
4. Step 4: Simplify right side
   78,651.80x = 4,650,317,350.01
5. Step 5: Solve for x
   x = 4,650,317,350.01/78,651.80
6. Step 6: Final answer
   x = 59,125.38