Finding the Fourth Proportional to 10,118.72, 13,965.60 and 7,724.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,118.72 : 13,965.60 = 7,724.76 : x
2. Step 2: Convert to fraction form
   10,118.72/13,965.60 = 7,724.76/x
3. Step 3: Cross multiply
   10,118.72x = 13,965.60 × 7,724.76
4. Step 4: Simplify right side
   10,118.72x = 107,880,908.26
5. Step 5: Solve for x
   x = 107,880,908.26/10,118.72
6. Step 6: Final answer
   x = 10,661.52