Finding the Fourth Proportional to 30,493.16, 42,093.83 and 21,885.49

Step by Step Solution

1. Step 1: Write the proportion equation
   30,493.16 : 42,093.83 = 21,885.49 : x
2. Step 2: Convert to fraction form
   30,493.16/42,093.83 = 21,885.49/x
3. Step 3: Cross multiply
   30,493.16x = 42,093.83 × 21,885.49
4. Step 4: Simplify right side
   30,493.16x = 921,244,079.75
5. Step 5: Solve for x
   x = 921,244,079.75/30,493.16
6. Step 6: Final answer
   x = 30,211.50