Finding the Fourth Proportional to 1,145.30, 1,714.15 and 1,042.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.30 : 1,714.15 = 1,042.82 : x
2. Step 2: Convert to fraction form
   1,145.30/1,714.15 = 1,042.82/x
3. Step 3: Cross multiply
   1,145.30x = 1,714.15 × 1,042.82
4. Step 4: Simplify right side
   1,145.30x = 1,787,549.90
5. Step 5: Solve for x
   x = 1,787,549.90/1,145.30
6. Step 6: Final answer
   x = 1,560.77