Finding the Fourth Proportional to 10,989.62, 15,174.36 and 10,149.98

Step by Step Solution

1. Step 1: Write the proportion equation
   10,989.62 : 15,174.36 = 10,149.98 : x
2. Step 2: Convert to fraction form
   10,989.62/15,174.36 = 10,149.98/x
3. Step 3: Cross multiply
   10,989.62x = 15,174.36 × 10,149.98
4. Step 4: Simplify right side
   10,989.62x = 154,019,488.45
5. Step 5: Solve for x
   x = 154,019,488.45/10,989.62
6. Step 6: Final answer
   x = 14,015.00