Finding the Fourth Proportional to 12,965.88, 17,888.76 and 7,662.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,965.88 : 17,888.76 = 7,662.48 : x
2. Step 2: Convert to fraction form
   12,965.88/17,888.76 = 7,662.48/x
3. Step 3: Cross multiply
   12,965.88x = 17,888.76 × 7,662.48
4. Step 4: Simplify right side
   12,965.88x = 137,072,265.72
5. Step 5: Solve for x
   x = 137,072,265.72/12,965.88
6. Step 6: Final answer
   x = 10,571.77