Finding the Fourth Proportional to 22,372.40, 30,870.90 and 13,871.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,372.40 : 30,870.90 = 13,871.42 : x
2. Step 2: Convert to fraction form
   22,372.40/30,870.90 = 13,871.42/x
3. Step 3: Cross multiply
   22,372.40x = 30,870.90 × 13,871.42
4. Step 4: Simplify right side
   22,372.40x = 428,223,065.32
5. Step 5: Solve for x
   x = 428,223,065.32/22,372.40
6. Step 6: Final answer
   x = 19,140.69