Finding the Fourth Proportional to 10,998.94, 15,174.55 and 7,224.15

Step by Step Solution

1. Step 1: Write the proportion equation
   10,998.94 : 15,174.55 = 7,224.15 : x
2. Step 2: Convert to fraction form
   10,998.94/15,174.55 = 7,224.15/x
3. Step 3: Cross multiply
   10,998.94x = 15,174.55 × 7,224.15
4. Step 4: Simplify right side
   10,998.94x = 109,623,225.38
5. Step 5: Solve for x
   x = 109,623,225.38/10,998.94
6. Step 6: Final answer
   x = 9,966.71