Finding the Fourth Proportional to 30,789.54, 42,489.43 and 16,642.35

Step by Step Solution

1. Step 1: Write the proportion equation
   30,789.54 : 42,489.43 = 16,642.35 : x
2. Step 2: Convert to fraction form
   30,789.54/42,489.43 = 16,642.35/x
3. Step 3: Cross multiply
   30,789.54x = 42,489.43 × 16,642.35
4. Step 4: Simplify right side
   30,789.54x = 707,123,923.75
5. Step 5: Solve for x
   x = 707,123,923.75/30,789.54
6. Step 6: Final answer
   x = 22,966.37