Finding the Fourth Proportional to 2,077.10, 3,116.72 and 845.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.10 : 3,116.72 = 845.42 : x
2. Step 2: Convert to fraction form
   2,077.10/3,116.72 = 845.42/x
3. Step 3: Cross multiply
   2,077.10x = 3,116.72 × 845.42
4. Step 4: Simplify right side
   2,077.10x = 2,634,923.95
5. Step 5: Solve for x
   x = 2,634,923.95/2,077.10
6. Step 6: Final answer
   x = 1,268.56