Finding the Fourth Proportional to 9,297.30, 12,830.28 and 5,522.28

Step by Step Solution

1. Step 1: Write the proportion equation
   9,297.30 : 12,830.28 = 5,522.28 : x
2. Step 2: Convert to fraction form
   9,297.30/12,830.28 = 5,522.28/x
3. Step 3: Cross multiply
   9,297.30x = 12,830.28 × 5,522.28
4. Step 4: Simplify right side
   9,297.30x = 70,852,398.64
5. Step 5: Solve for x
   x = 70,852,398.64/9,297.30
6. Step 6: Final answer
   x = 7,620.75