Finding the Fourth Proportional to 2,702.50, 4,055.31 and 1,142.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,702.50 : 4,055.31 = 1,142.40 : x
2. Step 2: Convert to fraction form
   2,702.50/4,055.31 = 1,142.40/x
3. Step 3: Cross multiply
   2,702.50x = 4,055.31 × 1,142.40
4. Step 4: Simplify right side
   2,702.50x = 4,632,784.88
5. Step 5: Solve for x
   x = 4,632,784.88/2,702.50
6. Step 6: Final answer
   x = 1,714.26