Finding the Fourth Proportional to 31,561.55, 43,554.32 and 18,132.49

Step by Step Solution

1. Step 1: Write the proportion equation
   31,561.55 : 43,554.32 = 18,132.49 : x
2. Step 2: Convert to fraction form
   31,561.55/43,554.32 = 18,132.49/x
3. Step 3: Cross multiply
   31,561.55x = 43,554.32 × 18,132.49
4. Step 4: Simplify right side
   31,561.55x = 789,748,054.09
5. Step 5: Solve for x
   x = 789,748,054.09/31,561.55
6. Step 6: Final answer
   x = 25,022.48