Finding the Fourth Proportional to 30,785.99, 42,484.67 and 16,638.83

Step by Step Solution

1. Step 1: Write the proportion equation
   30,785.99 : 42,484.67 = 16,638.83 : x
2. Step 2: Convert to fraction form
   30,785.99/42,484.67 = 16,638.83/x
3. Step 3: Cross multiply
   30,785.99x = 42,484.67 × 16,638.83
4. Step 4: Simplify right side
   30,785.99x = 706,895,118.54
5. Step 5: Solve for x
   x = 706,895,118.54/30,785.99
6. Step 6: Final answer
   x = 22,961.59