Finding the Fourth Proportional to 10,997.20, 16,499.42 and 7,313.92

Step by Step Solution

1. Step 1: Write the proportion equation
   10,997.20 : 16,499.42 = 7,313.92 : x
2. Step 2: Convert to fraction form
   10,997.20/16,499.42 = 7,313.92/x
3. Step 3: Cross multiply
   10,997.20x = 16,499.42 × 7,313.92
4. Step 4: Simplify right side
   10,997.20x = 120,675,437.93
5. Step 5: Solve for x
   x = 120,675,437.93/10,997.20
6. Step 6: Final answer
   x = 10,973.29