Finding the Fourth Proportional to 2,402.18, 3,313.30 and 1,561.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,402.18 : 3,313.30 = 1,561.33 : x
2. Step 2: Convert to fraction form
   2,402.18/3,313.30 = 1,561.33/x
3. Step 3: Cross multiply
   2,402.18x = 3,313.30 × 1,561.33
4. Step 4: Simplify right side
   2,402.18x = 5,173,154.69
5. Step 5: Solve for x
   x = 5,173,154.69/2,402.18
6. Step 6: Final answer
   x = 2,153.53