Finding the Fourth Proportional to 1,377.45, 1,900.85 and 779.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.45 : 1,900.85 = 779.96 : x
2. Step 2: Convert to fraction form
   1,377.45/1,900.85 = 779.96/x
3. Step 3: Cross multiply
   1,377.45x = 1,900.85 × 779.96
4. Step 4: Simplify right side
   1,377.45x = 1,482,573.56
5. Step 5: Solve for x
   x = 1,482,573.56/1,377.45
6. Step 6: Final answer
   x = 1,076.32