Finding the Fourth Proportional to 2,631.42, 3,948.83 and 2,420.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.42 : 3,948.83 = 2,420.25 : x
2. Step 2: Convert to fraction form
   2,631.42/3,948.83 = 2,420.25/x
3. Step 3: Cross multiply
   2,631.42x = 3,948.83 × 2,420.25
4. Step 4: Simplify right side
   2,631.42x = 9,557,143.71
5. Step 5: Solve for x
   x = 9,557,143.71/2,631.42
6. Step 6: Final answer
   x = 3,631.93