Finding the Fourth Proportional to 2,271.31, 3,131.78 and 1,563.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,271.31 : 3,131.78 = 1,563.53 : x
2. Step 2: Convert to fraction form
   2,271.31/3,131.78 = 1,563.53/x
3. Step 3: Cross multiply
   2,271.31x = 3,131.78 × 1,563.53
4. Step 4: Simplify right side
   2,271.31x = 4,896,608.51
5. Step 5: Solve for x
   x = 4,896,608.51/2,271.31
6. Step 6: Final answer
   x = 2,155.85