Finding the Fourth Proportional to 3,287.31, 4,535.49 and 2,167.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,287.31 : 4,535.49 = 2,167.86 : x
2. Step 2: Convert to fraction form
   3,287.31/4,535.49 = 2,167.86/x
3. Step 3: Cross multiply
   3,287.31x = 4,535.49 × 2,167.86
4. Step 4: Simplify right side
   3,287.31x = 9,832,307.35
5. Step 5: Solve for x
   x = 9,832,307.35/3,287.31
6. Step 6: Final answer
   x = 2,990.99