Finding the Fourth Proportional to 10,665.84, 16,021.98 and 10,315.92

Step by Step Solution

1. Step 1: Write the proportion equation
   10,665.84 : 16,021.98 = 10,315.92 : x
2. Step 2: Convert to fraction form
   10,665.84/16,021.98 = 10,315.92/x
3. Step 3: Cross multiply
   10,665.84x = 16,021.98 × 10,315.92
4. Step 4: Simplify right side
   10,665.84x = 165,281,463.92
5. Step 5: Solve for x
   x = 165,281,463.92/10,665.84
6. Step 6: Final answer
   x = 15,496.34