Finding the Fourth Proportional to 10,824.05, 16,236.18 and 3,428.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,824.05 : 16,236.18 = 3,428.55 : x
2. Step 2: Convert to fraction form
   10,824.05/16,236.18 = 3,428.55/x
3. Step 3: Cross multiply
   10,824.05x = 16,236.18 × 3,428.55
4. Step 4: Simplify right side
   10,824.05x = 55,666,554.94
5. Step 5: Solve for x
   x = 55,666,554.94/10,824.05
6. Step 6: Final answer
   x = 5,142.86