Finding the Fourth Proportional to 2,610.16, 3,911.72 and 1,312.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.16 : 3,911.72 = 1,312.56 : x
2. Step 2: Convert to fraction form
   2,610.16/3,911.72 = 1,312.56/x
3. Step 3: Cross multiply
   2,610.16x = 3,911.72 × 1,312.56
4. Step 4: Simplify right side
   2,610.16x = 5,134,367.20
5. Step 5: Solve for x
   x = 5,134,367.20/2,610.16
6. Step 6: Final answer
   x = 1,967.07