Finding the Fourth Proportional to 31,549.25, 43,538.00 and 18,123.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,549.25 : 43,538.00 = 18,123.10 : x
2. Step 2: Convert to fraction form
   31,549.25/43,538.00 = 18,123.10/x
3. Step 3: Cross multiply
   31,549.25x = 43,538.00 × 18,123.10
4. Step 4: Simplify right side
   31,549.25x = 789,043,437.18
5. Step 5: Solve for x
   x = 789,043,437.18/31,549.25
6. Step 6: Final answer
   x = 25,009.90