Finding the Fourth Proportional to 2,601.18, 3,902.31 and 1,216.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,601.18 : 3,902.31 = 1,216.08 : x
2. Step 2: Convert to fraction form
   2,601.18/3,902.31 = 1,216.08/x
3. Step 3: Cross multiply
   2,601.18x = 3,902.31 × 1,216.08
4. Step 4: Simplify right side
   2,601.18x = 4,745,521.14
5. Step 5: Solve for x
   x = 4,745,521.14/2,601.18
6. Step 6: Final answer
   x = 1,824.37