Finding the Fourth Proportional to 22,435.26, 30,931.89 and 18,387.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,435.26 : 30,931.89 = 18,387.18 : x
2. Step 2: Convert to fraction form
   22,435.26/30,931.89 = 18,387.18/x
3. Step 3: Cross multiply
   22,435.26x = 30,931.89 × 18,387.18
4. Step 4: Simplify right side
   22,435.26x = 568,750,160.22
5. Step 5: Solve for x
   x = 568,750,160.22/22,435.26
6. Step 6: Final answer
   x = 25,350.73