Finding the Fourth Proportional to 2,428.82, 3,643.74 and 1,389.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.82 : 3,643.74 = 1,389.32 : x
2. Step 2: Convert to fraction form
   2,428.82/3,643.74 = 1,389.32/x
3. Step 3: Cross multiply
   2,428.82x = 3,643.74 × 1,389.32
4. Step 4: Simplify right side
   2,428.82x = 5,062,302.64
5. Step 5: Solve for x
   x = 5,062,302.64/2,428.82
6. Step 6: Final answer
   x = 2,084.27