Finding the Fourth Proportional to 28,414.62, 42,612.69 and 13,419.41

Step by Step Solution

1. Step 1: Write the proportion equation
   28,414.62 : 42,612.69 = 13,419.41 : x
2. Step 2: Convert to fraction form
   28,414.62/42,612.69 = 13,419.41/x
3. Step 3: Cross multiply
   28,414.62x = 42,612.69 × 13,419.41
4. Step 4: Simplify right side
   28,414.62x = 571,837,264.84
5. Step 5: Solve for x
   x = 571,837,264.84/28,414.62
6. Step 6: Final answer
   x = 20,124.75