Finding the Fourth Proportional to 1,655.78, 2,485.56 and 1,310.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,655.78 : 2,485.56 = 1,310.27 : x
2. Step 2: Convert to fraction form
   1,655.78/2,485.56 = 1,310.27/x
3. Step 3: Cross multiply
   1,655.78x = 2,485.56 × 1,310.27
4. Step 4: Simplify right side
   1,655.78x = 3,256,742.27
5. Step 5: Solve for x
   x = 3,256,742.27/1,655.78
6. Step 6: Final answer
   x = 1,966.90