Finding the Fourth Proportional to 22,420.88, 30,940.81 and 12,994.91

Step by Step Solution

1. Step 1: Write the proportion equation
   22,420.88 : 30,940.81 = 12,994.91 : x
2. Step 2: Convert to fraction form
   22,420.88/30,940.81 = 12,994.91/x
3. Step 3: Cross multiply
   22,420.88x = 30,940.81 × 12,994.91
4. Step 4: Simplify right side
   22,420.88x = 402,072,854.09
5. Step 5: Solve for x
   x = 402,072,854.09/22,420.88
6. Step 6: Final answer
   x = 17,932.97