Finding the Fourth Proportional to 1,561.89, 2,340.67 and 1,291.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.89 : 2,340.67 = 1,291.24 : x
2. Step 2: Convert to fraction form
   1,561.89/2,340.67 = 1,291.24/x
3. Step 3: Cross multiply
   1,561.89x = 2,340.67 × 1,291.24
4. Step 4: Simplify right side
   1,561.89x = 3,022,366.73
5. Step 5: Solve for x
   x = 3,022,366.73/1,561.89
6. Step 6: Final answer
   x = 1,935.07