Finding the Fourth Proportional to 12,297.31, 18,439.56 and 4,396.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,297.31 : 18,439.56 = 4,396.78 : x
2. Step 2: Convert to fraction form
   12,297.31/18,439.56 = 4,396.78/x
3. Step 3: Cross multiply
   12,297.31x = 18,439.56 × 4,396.78
4. Step 4: Simplify right side
   12,297.31x = 81,074,688.62
5. Step 5: Solve for x
   x = 81,074,688.62/12,297.31
6. Step 6: Final answer
   x = 6,592.88