Finding the Fourth Proportional to 28,047.28, 42,087 and 11,404.24

Step by Step Solution

1. Step 1: Write the proportion equation
   28,047.28 : 42,087 = 11,404.24 : x
2. Step 2: Convert to fraction form
   28,047.28/42,087 = 11,404.24/x
3. Step 3: Cross multiply
   28,047.28x = 42,087 × 11,404.24
4. Step 4: Simplify right side
   28,047.28x = 479,970,248.88
5. Step 5: Solve for x
   x = 479,970,248.88/28,047.28
6. Step 6: Final answer
   x = 17,112.90