Finding the Fourth Proportional to 1,561.12, 2,342.49 and 1,131.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.12 : 2,342.49 = 1,131.82 : x
2. Step 2: Convert to fraction form
   1,561.12/2,342.49 = 1,131.82/x
3. Step 3: Cross multiply
   1,561.12x = 2,342.49 × 1,131.82
4. Step 4: Simplify right side
   1,561.12x = 2,651,277.03
5. Step 5: Solve for x
   x = 2,651,277.03/1,561.12
6. Step 6: Final answer
   x = 1,698.32