Finding the Fourth Proportional to 30,789.06, 42,488.90 and 16,641.90

Step by Step Solution

1. Step 1: Write the proportion equation
   30,789.06 : 42,488.90 = 16,641.90 : x
2. Step 2: Convert to fraction form
   30,789.06/42,488.90 = 16,641.90/x
3. Step 3: Cross multiply
   30,789.06x = 42,488.90 × 16,641.90
4. Step 4: Simplify right side
   30,789.06x = 707,096,024.91
5. Step 5: Solve for x
   x = 707,096,024.91/30,789.06
6. Step 6: Final answer
   x = 22,965.82