Finding the Fourth Proportional to 1,377.88, 1,900.77 and 880.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.88 : 1,900.77 = 880.00 : x
2. Step 2: Convert to fraction form
   1,377.88/1,900.77 = 880.00/x
3. Step 3: Cross multiply
   1,377.88x = 1,900.77 × 880.00
4. Step 4: Simplify right side
   1,377.88x = 1,672,663.70
5. Step 5: Solve for x
   x = 1,672,663.70/1,377.88
6. Step 6: Final answer
   x = 1,213.94