Finding the Fourth Proportional to 2,307.12, 3,182.61 and 1,561.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,307.12 : 3,182.61 = 1,561.33 : x
2. Step 2: Convert to fraction form
   2,307.12/3,182.61 = 1,561.33/x
3. Step 3: Cross multiply
   2,307.12x = 3,182.61 × 1,561.33
4. Step 4: Simplify right side
   2,307.12x = 4,969,087.62
5. Step 5: Solve for x
   x = 4,969,087.62/2,307.12
6. Step 6: Final answer
   x = 2,153.81