Finding the Fourth Proportional to 1,357.23, 1,871.33 and 1,147.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,357.23 : 1,871.33 = 1,147.03 : x
2. Step 2: Convert to fraction form
   1,357.23/1,871.33 = 1,147.03/x
3. Step 3: Cross multiply
   1,357.23x = 1,871.33 × 1,147.03
4. Step 4: Simplify right side
   1,357.23x = 2,146,472.56
5. Step 5: Solve for x
   x = 2,146,472.56/1,357.23
6. Step 6: Final answer
   x = 1,581.51