Finding the Fourth Proportional to 2,427.39, 3,638.27 and 1,388.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,427.39 : 3,638.27 = 1,388.12 : x
2. Step 2: Convert to fraction form
   2,427.39/3,638.27 = 1,388.12/x
3. Step 3: Cross multiply
   2,427.39x = 3,638.27 × 1,388.12
4. Step 4: Simplify right side
   2,427.39x = 5,050,355.35
5. Step 5: Solve for x
   x = 5,050,355.35/2,427.39
6. Step 6: Final answer
   x = 2,080.57