Finding the Fourth Proportional to 22,387.82, 30,913.88 and 19,993.57

Step by Step Solution

1. Step 1: Write the proportion equation
   22,387.82 : 30,913.88 = 19,993.57 : x
2. Step 2: Convert to fraction form
   22,387.82/30,913.88 = 19,993.57/x
3. Step 3: Cross multiply
   22,387.82x = 30,913.88 × 19,993.57
4. Step 4: Simplify right side
   22,387.82x = 618,078,646.50
5. Step 5: Solve for x
   x = 618,078,646.50/22,387.82
6. Step 6: Final answer
   x = 27,607.81