Finding the Fourth Proportional to 9,212.78, 12,710.02 and 5,669.84

Step by Step Solution

1. Step 1: Write the proportion equation
   9,212.78 : 12,710.02 = 5,669.84 : x
2. Step 2: Convert to fraction form
   9,212.78/12,710.02 = 5,669.84/x
3. Step 3: Cross multiply
   9,212.78x = 12,710.02 × 5,669.84
4. Step 4: Simplify right side
   9,212.78x = 72,063,687.90
5. Step 5: Solve for x
   x = 72,063,687.90/9,212.78
6. Step 6: Final answer
   x = 7,822.15