Finding the Fourth Proportional to 2,265.55, 3,392.85 and 1,288.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,265.55 : 3,392.85 = 1,288.69 : x
2. Step 2: Convert to fraction form
   2,265.55/3,392.85 = 1,288.69/x
3. Step 3: Cross multiply
   2,265.55x = 3,392.85 × 1,288.69
4. Step 4: Simplify right side
   2,265.55x = 4,372,314.90
5. Step 5: Solve for x
   x = 4,372,314.90/2,265.55
6. Step 6: Final answer
   x = 1,929.92