Finding the Fourth Proportional to 2,109.49, 3,164.49 and 877.73

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109.49 : 3,164.49 = 877.73 : x
2. Step 2: Convert to fraction form
   2,109.49/3,164.49 = 877.73/x
3. Step 3: Cross multiply
   2,109.49x = 3,164.49 × 877.73
4. Step 4: Simplify right side
   2,109.49x = 2,777,573.52
5. Step 5: Solve for x
   x = 2,777,573.52/2,109.49
6. Step 6: Final answer
   x = 1,316.70