Finding the Fourth Proportional to 31,154.42, 42,991.60 and 17,724.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,154.42 : 42,991.60 = 17,724.42 : x
2. Step 2: Convert to fraction form
   31,154.42/42,991.60 = 17,724.42/x
3. Step 3: Cross multiply
   31,154.42x = 42,991.60 × 17,724.42
4. Step 4: Simplify right side
   31,154.42x = 762,001,174.87
5. Step 5: Solve for x
   x = 762,001,174.87/31,154.42
6. Step 6: Final answer
   x = 24,458.85