Finding the Fourth Proportional to 2,256.72, 3,112.74 and 2,070.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,256.72 : 3,112.74 = 2,070.90 : x
2. Step 2: Convert to fraction form
   2,256.72/3,112.74 = 2,070.90/x
3. Step 3: Cross multiply
   2,256.72x = 3,112.74 × 2,070.90
4. Step 4: Simplify right side
   2,256.72x = 6,446,173.27
5. Step 5: Solve for x
   x = 6,446,173.27/2,256.72
6. Step 6: Final answer
   x = 2,856.43