Finding the Fourth Proportional to 2,077.80, 3,113.98 and 843.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.80 : 3,113.98 = 843.76 : x
2. Step 2: Convert to fraction form
   2,077.80/3,113.98 = 843.76/x
3. Step 3: Cross multiply
   2,077.80x = 3,113.98 × 843.76
4. Step 4: Simplify right side
   2,077.80x = 2,627,451.76
5. Step 5: Solve for x
   x = 2,627,451.76/2,077.80
6. Step 6: Final answer
   x = 1,264.54