Finding the Fourth Proportional to 9,200.72, 12,699.86 and 5,224.48

Step by Step Solution

1. Step 1: Write the proportion equation
   9,200.72 : 12,699.86 = 5,224.48 : x
2. Step 2: Convert to fraction form
   9,200.72/12,699.86 = 5,224.48/x
3. Step 3: Cross multiply
   9,200.72x = 12,699.86 × 5,224.48
4. Step 4: Simplify right side
   9,200.72x = 66,350,164.57
5. Step 5: Solve for x
   x = 66,350,164.57/9,200.72
6. Step 6: Final answer
   x = 7,211.41