Finding the Fourth Proportional to 2,601.46, 3,896.98 and 1,212.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.46 : 3,896.98 = 1,212.90 : x
2. Step 2: Convert to fraction form
   2,601.46/3,896.98 = 1,212.90/x
3. Step 3: Cross multiply
   2,601.46x = 3,896.98 × 1,212.90
4. Step 4: Simplify right side
   2,601.46x = 4,726,647.04
5. Step 5: Solve for x
   x = 4,726,647.04/2,601.46
6. Step 6: Final answer
   x = 1,816.92