Finding the Fourth Proportional to 10,662.34, 15,990.72 and 4,424.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,662.34 : 15,990.72 = 4,424.12 : x
2. Step 2: Convert to fraction form
   10,662.34/15,990.72 = 4,424.12/x
3. Step 3: Cross multiply
   10,662.34x = 15,990.72 × 4,424.12
4. Step 4: Simplify right side
   10,662.34x = 70,744,864.17
5. Step 5: Solve for x
   x = 70,744,864.17/10,662.34
6. Step 6: Final answer
   x = 6,635.02