Finding the Fourth Proportional to 12,009.42, 16,581.78 and 7,763

Step by Step Solution

1. Step 1: Write the proportion equation
   12,009.42 : 16,581.78 = 7,763 : x
2. Step 2: Convert to fraction form
   12,009.42/16,581.78 = 7,763/x
3. Step 3: Cross multiply
   12,009.42x = 16,581.78 × 7,763
4. Step 4: Simplify right side
   12,009.42x = 128,724,358.14
5. Step 5: Solve for x
   x = 128,724,358.14/12,009.42
6. Step 6: Final answer
   x = 10,718.62