Finding the Fourth Proportional to 8,665.31, 11,954.76 and 5,306.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,665.31 : 11,954.76 = 5,306.42 : x
2. Step 2: Convert to fraction form
   8,665.31/11,954.76 = 5,306.42/x
3. Step 3: Cross multiply
   8,665.31x = 11,954.76 × 5,306.42
4. Step 4: Simplify right side
   8,665.31x = 63,436,977.56
5. Step 5: Solve for x
   x = 63,436,977.56/8,665.31
6. Step 6: Final answer
   x = 7,320.80