Finding the Fourth Proportional to 5,103.65, 7,042.82 and 2,866.25

Step by Step Solution

1. Step 1: Write the proportion equation
   5,103.65 : 7,042.82 = 2,866.25 : x
2. Step 2: Convert to fraction form
   5,103.65/7,042.82 = 2,866.25/x
3. Step 3: Cross multiply
   5,103.65x = 7,042.82 × 2,866.25
4. Step 4: Simplify right side
   5,103.65x = 20,186,502.86
5. Step 5: Solve for x
   x = 20,186,502.86/5,103.65
6. Step 6: Final answer
   x = 3,955.30