Finding the Fourth Proportional to 1,377.65, 1,900.67 and 880.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.65 : 1,900.67 = 880.25 : x
2. Step 2: Convert to fraction form
   1,377.65/1,900.67 = 880.25/x
3. Step 3: Cross multiply
   1,377.65x = 1,900.67 × 880.25
4. Step 4: Simplify right side
   1,377.65x = 1,673,050.86
5. Step 5: Solve for x
   x = 1,673,050.86/1,377.65
6. Step 6: Final answer
   x = 1,214.42