Finding the Fourth Proportional to 72,658.80, 108,987.48 and 43,055.31

Step by Step Solution

1. Step 1: Write the proportion equation
   72,658.80 : 108,987.48 = 43,055.31 : x
2. Step 2: Convert to fraction form
   72,658.80/108,987.48 = 43,055.31/x
3. Step 3: Cross multiply
   72,658.80x = 108,987.48 × 43,055.31
4. Step 4: Simplify right side
   72,658.80x = 4,692,489,737.52
5. Step 5: Solve for x
   x = 4,692,489,737.52/72,658.80
6. Step 6: Final answer
   x = 64,582.54