Finding the Fourth Proportional to 2,165.24, 3,248.82 and 1,139

Step by Step Solution

1. Step 1: Write the proportion equation
   2,165.24 : 3,248.82 = 1,139 : x
2. Step 2: Convert to fraction form
   2,165.24/3,248.82 = 1,139/x
3. Step 3: Cross multiply
   2,165.24x = 3,248.82 × 1,139
4. Step 4: Simplify right side
   2,165.24x = 3,700,405.98
5. Step 5: Solve for x
   x = 3,700,405.98/2,165.24
6. Step 6: Final answer
   x = 1,709.00