Finding the Fourth Proportional to 2,435.92, 3,361.72 and 1,388.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,435.92 : 3,361.72 = 1,388.16 : x
2. Step 2: Convert to fraction form
   2,435.92/3,361.72 = 1,388.16/x
3. Step 3: Cross multiply
   2,435.92x = 3,361.72 × 1,388.16
4. Step 4: Simplify right side
   2,435.92x = 4,666,605.24
5. Step 5: Solve for x
   x = 4,666,605.24/2,435.92
6. Step 6: Final answer
   x = 1,915.75