Finding the Fourth Proportional to 12,578.72, 17,358.45 and 7,274.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,578.72 : 17,358.45 = 7,274.03 : x
2. Step 2: Convert to fraction form
   12,578.72/17,358.45 = 7,274.03/x
3. Step 3: Cross multiply
   12,578.72x = 17,358.45 × 7,274.03
4. Step 4: Simplify right side
   12,578.72x = 126,265,886.05
5. Step 5: Solve for x
   x = 126,265,886.05/12,578.72
6. Step 6: Final answer
   x = 10,038.06