Finding the Fourth Proportional to 2,431.59, 3,641.55 and 1,388.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.59 : 3,641.55 = 1,388.43 : x
2. Step 2: Convert to fraction form
   2,431.59/3,641.55 = 1,388.43/x
3. Step 3: Cross multiply
   2,431.59x = 3,641.55 × 1,388.43
4. Step 4: Simplify right side
   2,431.59x = 5,056,045.72
5. Step 5: Solve for x
   x = 5,056,045.72/2,431.59
6. Step 6: Final answer
   x = 2,079.31