Finding the Fourth Proportional to 2,651.72, 3,976.99 and 802.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,651.72 : 3,976.99 = 802.40 : x
2. Step 2: Convert to fraction form
   2,651.72/3,976.99 = 802.40/x
3. Step 3: Cross multiply
   2,651.72x = 3,976.99 × 802.40
4. Step 4: Simplify right side
   2,651.72x = 3,191,114.89
5. Step 5: Solve for x
   x = 3,191,114.89/2,651.72
6. Step 6: Final answer
   x = 1,203.42