Finding the Fourth Proportional to 22,420.50, 30,940.29 and 12,994.53

Step by Step Solution

1. Step 1: Write the proportion equation
   22,420.50 : 30,940.29 = 12,994.53 : x
2. Step 2: Convert to fraction form
   22,420.50/30,940.29 = 12,994.53/x
3. Step 3: Cross multiply
   22,420.50x = 30,940.29 × 12,994.53
4. Step 4: Simplify right side
   22,420.50x = 402,054,526.61
5. Step 5: Solve for x
   x = 402,054,526.61/22,420.50
6. Step 6: Final answer
   x = 17,932.45