Finding the Fourth Proportional to 2,291.79, 3,159.59 and 1,821.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.79 : 3,159.59 = 1,821.25 : x
2. Step 2: Convert to fraction form
   2,291.79/3,159.59 = 1,821.25/x
3. Step 3: Cross multiply
   2,291.79x = 3,159.59 × 1,821.25
4. Step 4: Simplify right side
   2,291.79x = 5,754,403.29
5. Step 5: Solve for x
   x = 5,754,403.29/2,291.79
6. Step 6: Final answer
   x = 2,510.88