Finding the Fourth Proportional to 30,993, 42,770.18 and 16,845.92

Step by Step Solution

1. Step 1: Write the proportion equation
   30,993 : 42,770.18 = 16,845.92 : x
2. Step 2: Convert to fraction form
   30,993/42,770.18 = 16,845.92/x
3. Step 3: Cross multiply
   30,993x = 42,770.18 × 16,845.92
4. Step 4: Simplify right side
   30,993x = 720,503,030.67
5. Step 5: Solve for x
   x = 720,503,030.67/30,993
6. Step 6: Final answer
   x = 23,247.28