Finding the Fourth Proportional to 2,291.16, 3,158.75 and 1,820.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,291.16 : 3,158.75 = 1,820.61 : x
2. Step 2: Convert to fraction form
   2,291.16/3,158.75 = 1,820.61/x
3. Step 3: Cross multiply
   2,291.16x = 3,158.75 × 1,820.61
4. Step 4: Simplify right side
   2,291.16x = 5,750,842.73
5. Step 5: Solve for x
   x = 5,750,842.73/2,291.16
6. Step 6: Final answer
   x = 2,510.01