Finding the Fourth Proportional to 1,116.93, 1,665.57 and 1,039.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.93 : 1,665.57 = 1,039.02 : x
2. Step 2: Convert to fraction form
   1,116.93/1,665.57 = 1,039.02/x
3. Step 3: Cross multiply
   1,116.93x = 1,665.57 × 1,039.02
4. Step 4: Simplify right side
   1,116.93x = 1,730,560.54
5. Step 5: Solve for x
   x = 1,730,560.54/1,116.93
6. Step 6: Final answer
   x = 1,549.39