Finding the Fourth Proportional to 1,377.28, 1,900.86 and 880.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.28 : 1,900.86 = 880.25 : x
2. Step 2: Convert to fraction form
   1,377.28/1,900.86 = 880.25/x
3. Step 3: Cross multiply
   1,377.28x = 1,900.86 × 880.25
4. Step 4: Simplify right side
   1,377.28x = 1,673,234.57
5. Step 5: Solve for x
   x = 1,673,234.57/1,377.28
6. Step 6: Final answer
   x = 1,214.88