Finding the Fourth Proportional to 21,993.89, 30,355.63 and 12,562.45

Step by Step Solution

1. Step 1: Write the proportion equation
   21,993.89 : 30,355.63 = 12,562.45 : x
2. Step 2: Convert to fraction form
   21,993.89/30,355.63 = 12,562.45/x
3. Step 3: Cross multiply
   21,993.89x = 30,355.63 × 12,562.45
4. Step 4: Simplify right side
   21,993.89x = 381,341,084.09
5. Step 5: Solve for x
   x = 381,341,084.09/21,993.89
6. Step 6: Final answer
   x = 17,338.50