Finding the Fourth Proportional to 1,259.28, 1,891.89 and 740.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.28 : 1,891.89 = 740.61 : x
2. Step 2: Convert to fraction form
   1,259.28/1,891.89 = 740.61/x
3. Step 3: Cross multiply
   1,259.28x = 1,891.89 × 740.61
4. Step 4: Simplify right side
   1,259.28x = 1,401,152.65
5. Step 5: Solve for x
   x = 1,401,152.65/1,259.28
6. Step 6: Final answer
   x = 1,112.66