Finding the Fourth Proportional to 2,389.40, 3,297.78 and 1,505.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,389.40 : 3,297.78 = 1,505.49 : x
2. Step 2: Convert to fraction form
   2,389.40/3,297.78 = 1,505.49/x
3. Step 3: Cross multiply
   2,389.40x = 3,297.78 × 1,505.49
4. Step 4: Simplify right side
   2,389.40x = 4,964,774.81
5. Step 5: Solve for x
   x = 4,964,774.81/2,389.40
6. Step 6: Final answer
   x = 2,077.84