Finding the Fourth Proportional to 2,417.50, 3,627.69 and 878.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,417.50 : 3,627.69 = 878.62 : x
2. Step 2: Convert to fraction form
   2,417.50/3,627.69 = 878.62/x
3. Step 3: Cross multiply
   2,417.50x = 3,627.69 × 878.62
4. Step 4: Simplify right side
   2,417.50x = 3,187,338.46
5. Step 5: Solve for x
   x = 3,187,338.46/2,417.50
6. Step 6: Final answer
   x = 1,318.45