Finding the Fourth Proportional to 2,601.54, 3,900.12 and 1,214.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.54 : 3,900.12 = 1,214.15 : x
2. Step 2: Convert to fraction form
   2,601.54/3,900.12 = 1,214.15/x
3. Step 3: Cross multiply
   2,601.54x = 3,900.12 × 1,214.15
4. Step 4: Simplify right side
   2,601.54x = 4,735,311.20
5. Step 5: Solve for x
   x = 4,735,311.20/2,601.54
6. Step 6: Final answer
   x = 1,820.20