Finding the Fourth Proportional to 9,204.72, 12,699.72 and 5,225.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,204.72 : 12,699.72 = 5,225.76 : x
2. Step 2: Convert to fraction form
   9,204.72/12,699.72 = 5,225.76/x
3. Step 3: Cross multiply
   9,204.72x = 12,699.72 × 5,225.76
4. Step 4: Simplify right side
   9,204.72x = 66,365,688.79
5. Step 5: Solve for x
   x = 66,365,688.79/9,204.72
6. Step 6: Final answer
   x = 7,209.96