Finding the Fourth Proportional to 1,357.45, 1,872.68 and 1,042.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.45 : 1,872.68 = 1,042.16 : x
2. Step 2: Convert to fraction form
   1,357.45/1,872.68 = 1,042.16/x
3. Step 3: Cross multiply
   1,357.45x = 1,872.68 × 1,042.16
4. Step 4: Simplify right side
   1,357.45x = 1,951,622.83
5. Step 5: Solve for x
   x = 1,951,622.83/1,357.45
6. Step 6: Final answer
   x = 1,437.72