Finding the Fourth Proportional to 1,116.33, 1,541.12 and 1,042.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,116.33 : 1,541.12 = 1,042.71 : x
2. Step 2: Convert to fraction form
   1,116.33/1,541.12 = 1,042.71/x
3. Step 3: Cross multiply
   1,116.33x = 1,541.12 × 1,042.71
4. Step 4: Simplify right side
   1,116.33x = 1,606,936.02
5. Step 5: Solve for x
   x = 1,606,936.02/1,116.33
6. Step 6: Final answer
   x = 1,439.48