Finding the Fourth Proportional to 1,376.96, 1,900.22 and 779.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,376.96 : 1,900.22 = 779.58 : x
2. Step 2: Convert to fraction form
   1,376.96/1,900.22 = 779.58/x
3. Step 3: Cross multiply
   1,376.96x = 1,900.22 × 779.58
4. Step 4: Simplify right side
   1,376.96x = 1,481,369.61
5. Step 5: Solve for x
   x = 1,481,369.61/1,376.96
6. Step 6: Final answer
   x = 1,075.83