Finding the Fourth Proportional to 10,981.40, 16,483.98 and 4,412.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,981.40 : 16,483.98 = 4,412.12 : x
2. Step 2: Convert to fraction form
   10,981.40/16,483.98 = 4,412.12/x
3. Step 3: Cross multiply
   10,981.40x = 16,483.98 × 4,412.12
4. Step 4: Simplify right side
   10,981.40x = 72,729,297.84
5. Step 5: Solve for x
   x = 72,729,297.84/10,981.40
6. Step 6: Final answer
   x = 6,622.95