Finding the Fourth Proportional to 2,348.61, 3,240.96 and 1,286.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,348.61 : 3,240.96 = 1,286.31 : x
2. Step 2: Convert to fraction form
   2,348.61/3,240.96 = 1,286.31/x
3. Step 3: Cross multiply
   2,348.61x = 3,240.96 × 1,286.31
4. Step 4: Simplify right side
   2,348.61x = 4,168,886.59
5. Step 5: Solve for x
   x = 4,168,886.59/2,348.61
6. Step 6: Final answer
   x = 1,775.05