Finding the Fourth Proportional to 22,912, 31,618.56 and 12,976

Step by Step Solution

1. Step 1: Write the proportion equation
   22,912 : 31,618.56 = 12,976 : x
2. Step 2: Convert to fraction form
   22,912/31,618.56 = 12,976/x
3. Step 3: Cross multiply
   22,912x = 31,618.56 × 12,976
4. Step 4: Simplify right side
   22,912x = 410,282,434.56
5. Step 5: Solve for x
   x = 410,282,434.56/22,912
6. Step 6: Final answer
   x = 17,906.88