Finding the Fourth Proportional to 30,767.88, 42,459.71 and 16,620.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,767.88 : 42,459.71 = 16,620.72 : x
2. Step 2: Convert to fraction form
   30,767.88/42,459.71 = 16,620.72/x
3. Step 3: Cross multiply
   30,767.88x = 42,459.71 × 16,620.72
4. Step 4: Simplify right side
   30,767.88x = 705,710,951.19
5. Step 5: Solve for x
   x = 705,710,951.19/30,767.88
6. Step 6: Final answer
   x = 22,936.61