Finding the Fourth Proportional to 1,139.18, 1,706.91 and 1,029.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.18 : 1,706.91 = 1,029.83 : x
2. Step 2: Convert to fraction form
   1,139.18/1,706.91 = 1,029.83/x
3. Step 3: Cross multiply
   1,139.18x = 1,706.91 × 1,029.83
4. Step 4: Simplify right side
   1,139.18x = 1,757,818.59
5. Step 5: Solve for x
   x = 1,757,818.59/1,139.18
6. Step 6: Final answer
   x = 1,543.06