Finding the Fourth Proportional to 1,376.82, 1,899.32 and 878.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.82 : 1,899.32 = 878.94 : x
2. Step 2: Convert to fraction form
   1,376.82/1,899.32 = 878.94/x
3. Step 3: Cross multiply
   1,376.82x = 1,899.32 × 878.94
4. Step 4: Simplify right side
   1,376.82x = 1,669,383.93
5. Step 5: Solve for x
   x = 1,669,383.93/1,376.82
6. Step 6: Final answer
   x = 1,212.49