Finding the Fourth Proportional to 12,663.06, 17,476.74 and 9,513.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,663.06 : 17,476.74 = 9,513.78 : x
2. Step 2: Convert to fraction form
   12,663.06/17,476.74 = 9,513.78/x
3. Step 3: Cross multiply
   12,663.06x = 17,476.74 × 9,513.78
4. Step 4: Simplify right side
   12,663.06x = 166,269,859.48
5. Step 5: Solve for x
   x = 166,269,859.48/12,663.06
6. Step 6: Final answer
   x = 13,130.31