Finding the Fourth Proportional to 2,435.96, 3,361.80 and 1,388.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,435.96 : 3,361.80 = 1,388.09 : x
2. Step 2: Convert to fraction form
   2,435.96/3,361.80 = 1,388.09/x
3. Step 3: Cross multiply
   2,435.96x = 3,361.80 × 1,388.09
4. Step 4: Simplify right side
   2,435.96x = 4,666,480.96
5. Step 5: Solve for x
   x = 4,666,480.96/2,435.96
6. Step 6: Final answer
   x = 1,915.66