Finding the Fourth Proportional to 2,372.32, 3,559.20 and 1,139.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,372.32 : 3,559.20 = 1,139.38 : x
2. Step 2: Convert to fraction form
   2,372.32/3,559.20 = 1,139.38/x
3. Step 3: Cross multiply
   2,372.32x = 3,559.20 × 1,139.38
4. Step 4: Simplify right side
   2,372.32x = 4,055,281.30
5. Step 5: Solve for x
   x = 4,055,281.30/2,372.32
6. Step 6: Final answer
   x = 1,709.42