Finding the Fourth Proportional to 2,417.72, 3,626.52 and 878.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,417.72 : 3,626.52 = 878.72 : x
2. Step 2: Convert to fraction form
   2,417.72/3,626.52 = 878.72/x
3. Step 3: Cross multiply
   2,417.72x = 3,626.52 × 878.72
4. Step 4: Simplify right side
   2,417.72x = 3,186,695.65
5. Step 5: Solve for x
   x = 3,186,695.65/2,417.72
6. Step 6: Final answer
   x = 1,318.06