Finding the Fourth Proportional to 22,812.25, 31,480.92 and 12,876.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,812.25 : 31,480.92 = 12,876.25 : x
2. Step 2: Convert to fraction form
   22,812.25/31,480.92 = 12,876.25/x
3. Step 3: Cross multiply
   22,812.25x = 31,480.92 × 12,876.25
4. Step 4: Simplify right side
   22,812.25x = 405,356,196.15
5. Step 5: Solve for x
   x = 405,356,196.15/22,812.25
6. Step 6: Final answer
   x = 17,769.23