Finding the Fourth Proportional to 10,297.31, 14,171.99 and 8,490.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,297.31 : 14,171.99 = 8,490.34 : x
2. Step 2: Convert to fraction form
   10,297.31/14,171.99 = 8,490.34/x
3. Step 3: Cross multiply
   10,297.31x = 14,171.99 × 8,490.34
4. Step 4: Simplify right side
   10,297.31x = 120,324,935.69
5. Step 5: Solve for x
   x = 120,324,935.69/10,297.31
6. Step 6: Final answer
   x = 11,685.08