Finding the Fourth Proportional to 2,820.88, 3,891.90 and 1,641.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,820.88 : 3,891.90 = 1,641.52 : x
2. Step 2: Convert to fraction form
   2,820.88/3,891.90 = 1,641.52/x
3. Step 3: Cross multiply
   2,820.88x = 3,891.90 × 1,641.52
4. Step 4: Simplify right side
   2,820.88x = 6,388,631.69
5. Step 5: Solve for x
   x = 6,388,631.69/2,820.88
6. Step 6: Final answer
   x = 2,264.77