Finding the Fourth Proportional to 2,880.81, 4,321.29 and 800.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,880.81 : 4,321.29 = 800.82 : x
2. Step 2: Convert to fraction form
   2,880.81/4,321.29 = 800.82/x
3. Step 3: Cross multiply
   2,880.81x = 4,321.29 × 800.82
4. Step 4: Simplify right side
   2,880.81x = 3,460,575.46
5. Step 5: Solve for x
   x = 3,460,575.46/2,880.81
6. Step 6: Final answer
   x = 1,201.25