Finding the Fourth Proportional to 9,270.72, 12,790.96 and 5,492.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,270.72 : 12,790.96 = 5,492.20 : x
2. Step 2: Convert to fraction form
   9,270.72/12,790.96 = 5,492.20/x
3. Step 3: Cross multiply
   9,270.72x = 12,790.96 × 5,492.20
4. Step 4: Simplify right side
   9,270.72x = 70,250,510.51
5. Step 5: Solve for x
   x = 70,250,510.51/9,270.72
6. Step 6: Final answer
   x = 7,577.68