Finding the Fourth Proportional to 10,765.72, 14,838.42 and 8,212.60

Step by Step Solution

1. Step 1: Write the proportion equation
   10,765.72 : 14,838.42 = 8,212.60 : x
2. Step 2: Convert to fraction form
   10,765.72/14,838.42 = 8,212.60/x
3. Step 3: Cross multiply
   10,765.72x = 14,838.42 × 8,212.60
4. Step 4: Simplify right side
   10,765.72x = 121,862,008.09
5. Step 5: Solve for x
   x = 121,862,008.09/10,765.72
6. Step 6: Final answer
   x = 11,319.45