Finding the Fourth Proportional to 2,431.30, 3,641.55 and 2,107.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.30 : 3,641.55 = 2,107.30 : x
2. Step 2: Convert to fraction form
   2,431.30/3,641.55 = 2,107.30/x
3. Step 3: Cross multiply
   2,431.30x = 3,641.55 × 2,107.30
4. Step 4: Simplify right side
   2,431.30x = 7,673,838.32
5. Step 5: Solve for x
   x = 7,673,838.32/2,431.30
6. Step 6: Final answer
   x = 3,156.27