Finding the Fourth Proportional to 1,370.42, 2,057.30 and 1,142.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,370.42 : 2,057.30 = 1,142.10 : x
2. Step 2: Convert to fraction form
   1,370.42/2,057.30 = 1,142.10/x
3. Step 3: Cross multiply
   1,370.42x = 2,057.30 × 1,142.10
4. Step 4: Simplify right side
   1,370.42x = 2,349,640.90
5. Step 5: Solve for x
   x = 2,349,640.90/1,370.42
6. Step 6: Final answer
   x = 1,714.54