Finding the Fourth Proportional to 2,309.52, 3,187.17 and 1,261.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,309.52 : 3,187.17 = 1,261.61 : x
2. Step 2: Convert to fraction form
   2,309.52/3,187.17 = 1,261.61/x
3. Step 3: Cross multiply
   2,309.52x = 3,187.17 × 1,261.61
4. Step 4: Simplify right side
   2,309.52x = 4,020,949.61
5. Step 5: Solve for x
   x = 4,020,949.61/2,309.52
6. Step 6: Final answer
   x = 1,741.03