Finding the Fourth Proportional to 1,139.56, 1,573.50 and 741.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.56 : 1,573.50 = 741.43 : x
2. Step 2: Convert to fraction form
   1,139.56/1,573.50 = 741.43/x
3. Step 3: Cross multiply
   1,139.56x = 1,573.50 × 741.43
4. Step 4: Simplify right side
   1,139.56x = 1,166,640.11
5. Step 5: Solve for x
   x = 1,166,640.11/1,139.56
6. Step 6: Final answer
   x = 1,023.76