Finding the Fourth Proportional to 2,581.13, 3,561.89 and 1,402.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.13 : 3,561.89 = 1,402.20 : x
2. Step 2: Convert to fraction form
   2,581.13/3,561.89 = 1,402.20/x
3. Step 3: Cross multiply
   2,581.13x = 3,561.89 × 1,402.20
4. Step 4: Simplify right side
   2,581.13x = 4,994,475.15
5. Step 5: Solve for x
   x = 4,994,475.15/2,581.13
6. Step 6: Final answer
   x = 1,934.99