Finding the Fourth Proportional to 30,920.88, 42,670.83 and 16,773.78

Step by Step Solution

1. Step 1: Write the proportion equation
   30,920.88 : 42,670.83 = 16,773.78 : x
2. Step 2: Convert to fraction form
   30,920.88/42,670.83 = 16,773.78/x
3. Step 3: Cross multiply
   30,920.88x = 42,670.83 × 16,773.78
4. Step 4: Simplify right side
   30,920.88x = 715,751,114.84
5. Step 5: Solve for x
   x = 715,751,114.84/30,920.88
6. Step 6: Final answer
   x = 23,147.82