Finding the Fourth Proportional to 30,767.78, 42,459.56 and 16,620.63

Step by Step Solution

1. Step 1: Write the proportion equation
   30,767.78 : 42,459.56 = 16,620.63 : x
2. Step 2: Convert to fraction form
   30,767.78/42,459.56 = 16,620.63/x
3. Step 3: Cross multiply
   30,767.78x = 42,459.56 × 16,620.63
4. Step 4: Simplify right side
   30,767.78x = 705,704,456.72
5. Step 5: Solve for x
   x = 705,704,456.72/30,767.78
6. Step 6: Final answer
   x = 22,936.47