Finding the Fourth Proportional to 12,665.59, 17,476.63 and 7,628.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.59 : 17,476.63 = 7,628.81 : x
2. Step 2: Convert to fraction form
   12,665.59/17,476.63 = 7,628.81/x
3. Step 3: Cross multiply
   12,665.59x = 17,476.63 × 7,628.81
4. Step 4: Simplify right side
   12,665.59x = 133,325,783.26
5. Step 5: Solve for x
   x = 133,325,783.26/12,665.59
6. Step 6: Final answer
   x = 10,526.62