Finding the Fourth Proportional to 9,021.55, 12,455.12 and 5,667.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,021.55 : 12,455.12 = 5,667.23 : x
2. Step 2: Convert to fraction form
   9,021.55/12,455.12 = 5,667.23/x
3. Step 3: Cross multiply
   9,021.55x = 12,455.12 × 5,667.23
4. Step 4: Simplify right side
   9,021.55x = 70,586,001.38
5. Step 5: Solve for x
   x = 70,586,001.38/9,021.55
6. Step 6: Final answer
   x = 7,824.16