Finding the Fourth Proportional to 9,280.21, 12,802.16 and 5,300.27

Step by Step Solution

1. Step 1: Write the proportion equation
   9,280.21 : 12,802.16 = 5,300.27 : x
2. Step 2: Convert to fraction form
   9,280.21/12,802.16 = 5,300.27/x
3. Step 3: Cross multiply
   9,280.21x = 12,802.16 × 5,300.27
4. Step 4: Simplify right side
   9,280.21x = 67,854,878.08
5. Step 5: Solve for x
   x = 67,854,878.08/9,280.21
6. Step 6: Final answer
   x = 7,311.79