Finding the Fourth Proportional to 2,864.78, 3,955.16 and 2,200.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,864.78 : 3,955.16 = 2,200.34 : x
2. Step 2: Convert to fraction form
   2,864.78/3,955.16 = 2,200.34/x
3. Step 3: Cross multiply
   2,864.78x = 3,955.16 × 2,200.34
4. Step 4: Simplify right side
   2,864.78x = 8,702,696.75
5. Step 5: Solve for x
   x = 8,702,696.75/2,864.78
6. Step 6: Final answer
   x = 3,037.82