Finding the Fourth Proportional to 72,171.47, 99,596.86 and 40,340.43

Step by Step Solution

1. Step 1: Write the proportion equation
   72,171.47 : 99,596.86 = 40,340.43 : x
2. Step 2: Convert to fraction form
   72,171.47/99,596.86 = 40,340.43/x
3. Step 3: Cross multiply
   72,171.47x = 99,596.86 × 40,340.43
4. Step 4: Simplify right side
   72,171.47x = 4,017,780,058.20
5. Step 5: Solve for x
   x = 4,017,780,058.20/72,171.47
6. Step 6: Final answer
   x = 55,669.92