Finding the Fourth Proportional to 72,167.31, 99,591.26 and 40,335.53

Step by Step Solution

1. Step 1: Write the proportion equation
   72,167.31 : 99,591.26 = 40,335.53 : x
2. Step 2: Convert to fraction form
   72,167.31/99,591.26 = 40,335.53/x
3. Step 3: Cross multiply
   72,167.31x = 99,591.26 × 40,335.53
4. Step 4: Simplify right side
   72,167.31x = 4,017,065,555.83
5. Step 5: Solve for x
   x = 4,017,065,555.83/72,167.31
6. Step 6: Final answer
   x = 55,663.23