Finding the Fourth Proportional to 28,078.72, 42,132.84 and 11,451.04

Step by Step Solution

1. Step 1: Write the proportion equation
   28,078.72 : 42,132.84 = 11,451.04 : x
2. Step 2: Convert to fraction form
   28,078.72/42,132.84 = 11,451.04/x
3. Step 3: Cross multiply
   28,078.72x = 42,132.84 × 11,451.04
4. Step 4: Simplify right side
   28,078.72x = 482,464,836.15
5. Step 5: Solve for x
   x = 482,464,836.15/28,078.72
6. Step 6: Final answer
   x = 17,182.58