Finding the Fourth Proportional to 2,109.02, 3,162.85 and 876.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.02 : 3,162.85 = 876.79 : x
2. Step 2: Convert to fraction form
   2,109.02/3,162.85 = 876.79/x
3. Step 3: Cross multiply
   2,109.02x = 3,162.85 × 876.79
4. Step 4: Simplify right side
   2,109.02x = 2,773,155.25
5. Step 5: Solve for x
   x = 2,773,155.25/2,109.02
6. Step 6: Final answer
   x = 1,314.90