Finding the Fourth Proportional to 30,899.32, 42,626.71 and 18,148.43

Step by Step Solution

1. Step 1: Write the proportion equation
   30,899.32 : 42,626.71 = 18,148.43 : x
2. Step 2: Convert to fraction form
   30,899.32/42,626.71 = 18,148.43/x
3. Step 3: Cross multiply
   30,899.32x = 42,626.71 × 18,148.43
4. Step 4: Simplify right side
   30,899.32x = 773,607,862.57
5. Step 5: Solve for x
   x = 773,607,862.57/30,899.32
6. Step 6: Final answer
   x = 25,036.40