Finding the Fourth Proportional to 1,357.56, 1,871.37 and 1,118.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.56 : 1,871.37 = 1,118.61 : x
2. Step 2: Convert to fraction form
   1,357.56/1,871.37 = 1,118.61/x
3. Step 3: Cross multiply
   1,357.56x = 1,871.37 × 1,118.61
4. Step 4: Simplify right side
   1,357.56x = 2,093,333.20
5. Step 5: Solve for x
   x = 2,093,333.20/1,357.56
6. Step 6: Final answer
   x = 1,541.98