Finding the Fourth Proportional to 2,431.41, 3,646.77 and 1,388.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,431.41 : 3,646.77 = 1,388.03 : x
2. Step 2: Convert to fraction form
   2,431.41/3,646.77 = 1,388.03/x
3. Step 3: Cross multiply
   2,431.41x = 3,646.77 × 1,388.03
4. Step 4: Simplify right side
   2,431.41x = 5,061,820.79
5. Step 5: Solve for x
   x = 5,061,820.79/2,431.41
6. Step 6: Final answer
   x = 2,081.85