Finding the Fourth Proportional to 2,389.12, 3,266.34 and 2,298.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.12 : 3,266.34 = 2,298.40 : x
2. Step 2: Convert to fraction form
   2,389.12/3,266.34 = 2,298.40/x
3. Step 3: Cross multiply
   2,389.12x = 3,266.34 × 2,298.40
4. Step 4: Simplify right side
   2,389.12x = 7,507,355.86
5. Step 5: Solve for x
   x = 7,507,355.86/2,389.12
6. Step 6: Final answer
   x = 3,142.31