Finding the Fourth Proportional to 28,256.04, 42,385.68 and 7,479

Step by Step Solution

1. Step 1: Write the proportion equation
   28,256.04 : 42,385.68 = 7,479 : x
2. Step 2: Convert to fraction form
   28,256.04/42,385.68 = 7,479/x
3. Step 3: Cross multiply
   28,256.04x = 42,385.68 × 7,479
4. Step 4: Simplify right side
   28,256.04x = 317,002,500.72
5. Step 5: Solve for x
   x = 317,002,500.72/28,256.04
6. Step 6: Final answer
   x = 11,218.93