Finding the Fourth Proportional to 2,623.72, 3,934.52 and 868.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,623.72 : 3,934.52 = 868.64 : x
2. Step 2: Convert to fraction form
   2,623.72/3,934.52 = 868.64/x
3. Step 3: Cross multiply
   2,623.72x = 3,934.52 × 868.64
4. Step 4: Simplify right side
   2,623.72x = 3,417,681.45
5. Step 5: Solve for x
   x = 3,417,681.45/2,623.72
6. Step 6: Final answer
   x = 1,302.61