Finding the Fourth Proportional to 1,377.26, 1,899.83 and 879.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,377.26 : 1,899.83 = 879.35 : x
2. Step 2: Convert to fraction form
   1,377.26/1,899.83 = 879.35/x
3. Step 3: Cross multiply
   1,377.26x = 1,899.83 × 879.35
4. Step 4: Simplify right side
   1,377.26x = 1,670,601.61
5. Step 5: Solve for x
   x = 1,670,601.61/1,377.26
6. Step 6: Final answer
   x = 1,212.99