Finding the Fourth Proportional to 2,169.59, 3,248.82 and 1,390.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,169.59 : 3,248.82 = 1,390.46 : x
2. Step 2: Convert to fraction form
   2,169.59/3,248.82 = 1,390.46/x
3. Step 3: Cross multiply
   2,169.59x = 3,248.82 × 1,390.46
4. Step 4: Simplify right side
   2,169.59x = 4,517,338.01
5. Step 5: Solve for x
   x = 4,517,338.01/2,169.59
6. Step 6: Final answer
   x = 2,082.12