Finding the Fourth Proportional to 2,863.78, 3,953.78 and 2,199.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,863.78 : 3,953.78 = 2,199.34 : x
2. Step 2: Convert to fraction form
   2,863.78/3,953.78 = 2,199.34/x
3. Step 3: Cross multiply
   2,863.78x = 3,953.78 × 2,199.34
4. Step 4: Simplify right side
   2,863.78x = 8,695,706.51
5. Step 5: Solve for x
   x = 8,695,706.51/2,863.78
6. Step 6: Final answer
   x = 3,036.44