Finding the Fourth Proportional to 9,122.69, 13,688.10 and 5,227.10

Step by Step Solution

1. Step 1: Write the proportion equation
   9,122.69 : 13,688.10 = 5,227.10 : x
2. Step 2: Convert to fraction form
   9,122.69/13,688.10 = 5,227.10/x
3. Step 3: Cross multiply
   9,122.69x = 13,688.10 × 5,227.10
4. Step 4: Simplify right side
   9,122.69x = 71,548,999.07
5. Step 5: Solve for x
   x = 71,548,999.07/9,122.69
6. Step 6: Final answer
   x = 7,842.98