Finding the Fourth Proportional to 2,601.89, 3,900.64 and 1,214.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.89 : 3,900.64 = 1,214.49 : x
2. Step 2: Convert to fraction form
   2,601.89/3,900.64 = 1,214.49/x
3. Step 3: Cross multiply
   2,601.89x = 3,900.64 × 1,214.49
4. Step 4: Simplify right side
   2,601.89x = 4,737,288.27
5. Step 5: Solve for x
   x = 4,737,288.27/2,601.89
6. Step 6: Final answer
   x = 1,820.71