Finding the Fourth Proportional to 31,566.42, 43,560.18 and 18,128.22

Step by Step Solution

1. Step 1: Write the proportion equation
   31,566.42 : 43,560.18 = 18,128.22 : x
2. Step 2: Convert to fraction form
   31,566.42/43,560.18 = 18,128.22/x
3. Step 3: Cross multiply
   31,566.42x = 43,560.18 × 18,128.22
4. Step 4: Simplify right side
   31,566.42x = 789,668,526.28
5. Step 5: Solve for x
   x = 789,668,526.28/31,566.42
6. Step 6: Final answer
   x = 25,016.09