Finding the Fourth Proportional to 2,651.91, 3,978.06 and 802.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,651.91 : 3,978.06 = 802.86 : x
2. Step 2: Convert to fraction form
   2,651.91/3,978.06 = 802.86/x
3. Step 3: Cross multiply
   2,651.91x = 3,978.06 × 802.86
4. Step 4: Simplify right side
   2,651.91x = 3,193,825.25
5. Step 5: Solve for x
   x = 3,193,825.25/2,651.91
6. Step 6: Final answer
   x = 1,204.35