Finding the Fourth Proportional to 9,289.48, 12,820.64 and 5,310.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,289.48 : 12,820.64 = 5,310.04 : x
2. Step 2: Convert to fraction form
   9,289.48/12,820.64 = 5,310.04/x
3. Step 3: Cross multiply
   9,289.48x = 12,820.64 × 5,310.04
4. Step 4: Simplify right side
   9,289.48x = 68,078,111.23
5. Step 5: Solve for x
   x = 68,078,111.23/9,289.48
6. Step 6: Final answer
   x = 7,328.52