Finding the Fourth Proportional to 2,610.40, 3,912.76 and 1,222.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.40 : 3,912.76 = 1,222.87 : x
2. Step 2: Convert to fraction form
   2,610.40/3,912.76 = 1,222.87/x
3. Step 3: Cross multiply
   2,610.40x = 3,912.76 × 1,222.87
4. Step 4: Simplify right side
   2,610.40x = 4,784,796.82
5. Step 5: Solve for x
   x = 4,784,796.82/2,610.40
6. Step 6: Final answer
   x = 1,832.97