Finding the Fourth Proportional to 9,986.68, 14,967.42 and 5,057.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,986.68 : 14,967.42 = 5,057.56 : x
2. Step 2: Convert to fraction form
   9,986.68/14,967.42 = 5,057.56/x
3. Step 3: Cross multiply
   9,986.68x = 14,967.42 × 5,057.56
4. Step 4: Simplify right side
   9,986.68x = 75,698,624.70
5. Step 5: Solve for x
   x = 75,698,624.70/9,986.68
6. Step 6: Final answer
   x = 7,579.96