Finding the Fourth Proportional to 1,128.98, 1,693.92 and 479.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,128.98 : 1,693.92 = 479.82 : x
2. Step 2: Convert to fraction form
   1,128.98/1,693.92 = 479.82/x
3. Step 3: Cross multiply
   1,128.98x = 1,693.92 × 479.82
4. Step 4: Simplify right side
   1,128.98x = 812,776.69
5. Step 5: Solve for x
   x = 812,776.69/1,128.98
6. Step 6: Final answer
   x = 719.92