Finding the Fourth Proportional to 9,446.45, 12,981.38 and 9,012.83

Step by Step Solution

1. Step 1: Write the proportion equation
   9,446.45 : 12,981.38 = 9,012.83 : x
2. Step 2: Convert to fraction form
   9,446.45/12,981.38 = 9,012.83/x
3. Step 3: Cross multiply
   9,446.45x = 12,981.38 × 9,012.83
4. Step 4: Simplify right side
   9,446.45x = 116,998,861.13
5. Step 5: Solve for x
   x = 116,998,861.13/9,446.45
6. Step 6: Final answer
   x = 12,385.49