Finding the Fourth Proportional to 22,945.81, 31,665.30 and 12,874.67

Step by Step Solution

1. Step 1: Write the proportion equation
   22,945.81 : 31,665.30 = 12,874.67 : x
2. Step 2: Convert to fraction form
   22,945.81/31,665.30 = 12,874.67/x
3. Step 3: Cross multiply
   22,945.81x = 31,665.30 × 12,874.67
4. Step 4: Simplify right side
   22,945.81x = 407,680,287.95
5. Step 5: Solve for x
   x = 407,680,287.95/22,945.81
6. Step 6: Final answer
   x = 17,767.09