Finding the Fourth Proportional to 2,077.45, 3,113.78 and 843.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.45 : 3,113.78 = 843.50 : x
2. Step 2: Convert to fraction form
   2,077.45/3,113.78 = 843.50/x
3. Step 3: Cross multiply
   2,077.45x = 3,113.78 × 843.50
4. Step 4: Simplify right side
   2,077.45x = 2,626,469.21
5. Step 5: Solve for x
   x = 2,626,469.21/2,077.45
6. Step 6: Final answer
   x = 1,264.28