Finding the Fourth Proportional to 1,382.96, 1,908.61 and 878.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.96 : 1,908.61 = 878.73 : x
2. Step 2: Convert to fraction form
   1,382.96/1,908.61 = 878.73/x
3. Step 3: Cross multiply
   1,382.96x = 1,908.61 × 878.73
4. Step 4: Simplify right side
   1,382.96x = 1,677,152.87
5. Step 5: Solve for x
   x = 1,677,152.87/1,382.96
6. Step 6: Final answer
   x = 1,212.73