Finding the Fourth Proportional to 2,108.94, 3,162.06 and 877.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,108.94 : 3,162.06 = 877.20 : x
2. Step 2: Convert to fraction form
   2,108.94/3,162.06 = 877.20/x
3. Step 3: Cross multiply
   2,108.94x = 3,162.06 × 877.20
4. Step 4: Simplify right side
   2,108.94x = 2,773,759.03
5. Step 5: Solve for x
   x = 2,773,759.03/2,108.94
6. Step 6: Final answer
   x = 1,315.24