Finding the Fourth Proportional to 12,700.54, 17,528.76 and 7,665.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,700.54 : 17,528.76 = 7,665.48 : x
2. Step 2: Convert to fraction form
   12,700.54/17,528.76 = 7,665.48/x
3. Step 3: Cross multiply
   12,700.54x = 17,528.76 × 7,665.48
4. Step 4: Simplify right side
   12,700.54x = 134,366,320.88
5. Step 5: Solve for x
   x = 134,366,320.88/12,700.54
6. Step 6: Final answer
   x = 10,579.58