Finding the Fourth Proportional to 12,736.72, 17,577.48 and 7,148.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,736.72 : 17,577.48 = 7,148.08 : x
2. Step 2: Convert to fraction form
   12,736.72/17,577.48 = 7,148.08/x
3. Step 3: Cross multiply
   12,736.72x = 17,577.48 × 7,148.08
4. Step 4: Simplify right side
   12,736.72x = 125,645,233.24
5. Step 5: Solve for x
   x = 125,645,233.24/12,736.72
6. Step 6: Final answer
   x = 9,864.80