Finding the Fourth Proportional to 2,391.36, 3,300.62 and 1,397.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,391.36 : 3,300.62 = 1,397.12 : x
2. Step 2: Convert to fraction form
   2,391.36/3,300.62 = 1,397.12/x
3. Step 3: Cross multiply
   2,391.36x = 3,300.62 × 1,397.12
4. Step 4: Simplify right side
   2,391.36x = 4,611,362.21
5. Step 5: Solve for x
   x = 4,611,362.21/2,391.36
6. Step 6: Final answer
   x = 1,928.34