Finding the Fourth Proportional to 1,139.96, 1,562.88 and 1,119.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139.96 : 1,562.88 = 1,119.20 : x
2. Step 2: Convert to fraction form
   1,139.96/1,562.88 = 1,119.20/x
3. Step 3: Cross multiply
   1,139.96x = 1,562.88 × 1,119.20
4. Step 4: Simplify right side
   1,139.96x = 1,749,167.48
5. Step 5: Solve for x
   x = 1,749,167.48/1,139.96
6. Step 6: Final answer
   x = 1,534.42