Finding the Fourth Proportional to 31,549.87, 43,538.86 and 18,123.73

Step by Step Solution

1. Step 1: Write the proportion equation
   31,549.87 : 43,538.86 = 18,123.73 : x
2. Step 2: Convert to fraction form
   31,549.87/43,538.86 = 18,123.73/x
3. Step 3: Cross multiply
   31,549.87x = 43,538.86 × 18,123.73
4. Step 4: Simplify right side
   31,549.87x = 789,086,543.15
5. Step 5: Solve for x
   x = 789,086,543.15/31,549.87
6. Step 6: Final answer
   x = 25,010.77