Finding the Fourth Proportional to 2,432.49, 3,642.89 and 1,389.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,432.49 : 3,642.89 = 1,389.33 : x
2. Step 2: Convert to fraction form
   2,432.49/3,642.89 = 1,389.33/x
3. Step 3: Cross multiply
   2,432.49x = 3,642.89 × 1,389.33
4. Step 4: Simplify right side
   2,432.49x = 5,061,174.63
5. Step 5: Solve for x
   x = 5,061,174.63/2,432.49
6. Step 6: Final answer
   x = 2,080.65