Finding the Fourth Proportional to 22,424.76, 30,945.78 and 12,994.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,424.76 : 30,945.78 = 12,994.20 : x
2. Step 2: Convert to fraction form
   22,424.76/30,945.78 = 12,994.20/x
3. Step 3: Cross multiply
   22,424.76x = 30,945.78 × 12,994.20
4. Step 4: Simplify right side
   22,424.76x = 402,115,654.48
5. Step 5: Solve for x
   x = 402,115,654.48/22,424.76
6. Step 6: Final answer
   x = 17,931.77