Finding the Fourth Proportional to 2,173.85, 3,255.28 and 1,561.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,173.85 : 3,255.28 = 1,561.49 : x
2. Step 2: Convert to fraction form
   2,173.85/3,255.28 = 1,561.49/x
3. Step 3: Cross multiply
   2,173.85x = 3,255.28 × 1,561.49
4. Step 4: Simplify right side
   2,173.85x = 5,083,066.99
5. Step 5: Solve for x
   x = 5,083,066.99/2,173.85
6. Step 6: Final answer
   x = 2,338.28