Finding the Fourth Proportional to 28,411.02, 42,606.27 and 8,414.55

Step by Step Solution

1. Step 1: Write the proportion equation
   28,411.02 : 42,606.27 = 8,414.55 : x
2. Step 2: Convert to fraction form
   28,411.02/42,606.27 = 8,414.55/x
3. Step 3: Cross multiply
   28,411.02x = 42,606.27 × 8,414.55
4. Step 4: Simplify right side
   28,411.02x = 358,512,589.23
5. Step 5: Solve for x
   x = 358,512,589.23/28,411.02
6. Step 6: Final answer
   x = 12,618.79