Finding the Fourth Proportional to 2,569.62, 3,546.08 and 1,390.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,569.62 : 3,546.08 = 1,390.69 : x
2. Step 2: Convert to fraction form
   2,569.62/3,546.08 = 1,390.69/x
3. Step 3: Cross multiply
   2,569.62x = 3,546.08 × 1,390.69
4. Step 4: Simplify right side
   2,569.62x = 4,931,498.00
5. Step 5: Solve for x
   x = 4,931,498.00/2,569.62
6. Step 6: Final answer
   x = 1,919.15