Finding the Fourth Proportional to 10,118.72, 13,965.61 and 7,724.77

Step by Step Solution

1. Step 1: Write the proportion equation
   10,118.72 : 13,965.61 = 7,724.77 : x
2. Step 2: Convert to fraction form
   10,118.72/13,965.61 = 7,724.77/x
3. Step 3: Cross multiply
   10,118.72x = 13,965.61 × 7,724.77
4. Step 4: Simplify right side
   10,118.72x = 107,881,125.16
5. Step 5: Solve for x
   x = 107,881,125.16/10,118.72
6. Step 6: Final answer
   x = 10,661.54