Finding the Fourth Proportional to 8,061.20, 11,297.20 and 8,061.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,061.20 : 11,297.20 = 8,061.20 : x
2. Step 2: Convert to fraction form
   8,061.20/11,297.20 = 8,061.20/x
3. Step 3: Cross multiply
   8,061.20x = 11,297.20 × 8,061.20
4. Step 4: Simplify right side
   8,061.20x = 91,068,988.64
5. Step 5: Solve for x
   x = 91,068,988.64/8,061.20
6. Step 6: Final answer
   x = 11,297.20