Finding the Fourth Proportional to 9,221.03, 12,721.39 and 5,678.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,221.03 : 12,721.39 = 5,678.09 : x
2. Step 2: Convert to fraction form
   9,221.03/12,721.39 = 5,678.09/x
3. Step 3: Cross multiply
   9,221.03x = 12,721.39 × 5,678.09
4. Step 4: Simplify right side
   9,221.03x = 72,233,197.35
5. Step 5: Solve for x
   x = 72,233,197.35/9,221.03
6. Step 6: Final answer
   x = 7,833.53