Finding the Fourth Proportional to 22,433.28, 30,947.82 and 12,996.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,433.28 : 30,947.82 = 12,996.78 : x
2. Step 2: Convert to fraction form
   22,433.28/30,947.82 = 12,996.78/x
3. Step 3: Cross multiply
   22,433.28x = 30,947.82 × 12,996.78
4. Step 4: Simplify right side
   22,433.28x = 402,222,008.02
5. Step 5: Solve for x
   x = 402,222,008.02/22,433.28
6. Step 6: Final answer
   x = 17,929.70