Finding the Fourth Proportional to 22,132.15, 30,540.18 and 13,057.32

Step by Step Solution

1. Step 1: Write the proportion equation
   22,132.15 : 30,540.18 = 13,057.32 : x
2. Step 2: Convert to fraction form
   22,132.15/30,540.18 = 13,057.32/x
3. Step 3: Cross multiply
   22,132.15x = 30,540.18 × 13,057.32
4. Step 4: Simplify right side
   22,132.15x = 398,772,903.12
5. Step 5: Solve for x
   x = 398,772,903.12/22,132.15
6. Step 6: Final answer
   x = 18,017.81