Finding the Fourth Proportional to 1,377.90, 1,900.56 and 880.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.90 : 1,900.56 = 880.32 : x
2. Step 2: Convert to fraction form
   1,377.90/1,900.56 = 880.32/x
3. Step 3: Cross multiply
   1,377.90x = 1,900.56 × 880.32
4. Step 4: Simplify right side
   1,377.90x = 1,673,109.03
5. Step 5: Solve for x
   x = 1,673,109.03/1,377.90
6. Step 6: Final answer
   x = 1,214.24