Finding the Fourth Proportional to 2,581.06, 3,561.78 and 1,402.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.06 : 3,561.78 = 1,402.12 : x
2. Step 2: Convert to fraction form
   2,581.06/3,561.78 = 1,402.12/x
3. Step 3: Cross multiply
   2,581.06x = 3,561.78 × 1,402.12
4. Step 4: Simplify right side
   2,581.06x = 4,994,042.97
5. Step 5: Solve for x
   x = 4,994,042.97/2,581.06
6. Step 6: Final answer
   x = 1,934.88