Finding the Fourth Proportional to 1,426.32, 2,137.55 and 878.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.32 : 2,137.55 = 878.82 : x
2. Step 2: Convert to fraction form
   1,426.32/2,137.55 = 878.82/x
3. Step 3: Cross multiply
   1,426.32x = 2,137.55 × 878.82
4. Step 4: Simplify right side
   1,426.32x = 1,878,517.30
5. Step 5: Solve for x
   x = 1,878,517.30/1,426.32
6. Step 6: Final answer
   x = 1,317.04