Finding the Fourth Proportional to 10,861.72, 14,981.44 and 9,968.34

Step by Step Solution

1. Step 1: Write the proportion equation
   10,861.72 : 14,981.44 = 9,968.34 : x
2. Step 2: Convert to fraction form
   10,861.72/14,981.44 = 9,968.34/x
3. Step 3: Cross multiply
   10,861.72x = 14,981.44 × 9,968.34
4. Step 4: Simplify right side
   10,861.72x = 149,340,087.61
5. Step 5: Solve for x
   x = 149,340,087.61/10,861.72
6. Step 6: Final answer
   x = 13,749.21