Finding the Fourth Proportional to 11,128.80, 16,689.36 and 3,731.52

Step by Step Solution

1. Step 1: Write the proportion equation
   11,128.80 : 16,689.36 = 3,731.52 : x
2. Step 2: Convert to fraction form
   11,128.80/16,689.36 = 3,731.52/x
3. Step 3: Cross multiply
   11,128.80x = 16,689.36 × 3,731.52
4. Step 4: Simplify right side
   11,128.80x = 62,276,680.63
5. Step 5: Solve for x
   x = 62,276,680.63/11,128.80
6. Step 6: Final answer
   x = 5,595.99