Finding the Fourth Proportional to 22,812, 31,480.56 and 12,876

Step by Step Solution

1. Step 1: Write the proportion equation
   22,812 : 31,480.56 = 12,876 : x
2. Step 2: Convert to fraction form
   22,812/31,480.56 = 12,876/x
3. Step 3: Cross multiply
   22,812x = 31,480.56 × 12,876
4. Step 4: Simplify right side
   22,812x = 405,343,690.56
5. Step 5: Solve for x
   x = 405,343,690.56/22,812
6. Step 6: Final answer
   x = 17,768.88