Finding the Fourth Proportional to 30,997.30, 42,775.77 and 16,850.50

Step by Step Solution

1. Step 1: Write the proportion equation
   30,997.30 : 42,775.77 = 16,850.50 : x
2. Step 2: Convert to fraction form
   30,997.30/42,775.77 = 16,850.50/x
3. Step 3: Cross multiply
   30,997.30x = 42,775.77 × 16,850.50
4. Step 4: Simplify right side
   30,997.30x = 720,793,112.39
5. Step 5: Solve for x
   x = 720,793,112.39/30,997.30
6. Step 6: Final answer
   x = 23,253.42