Finding the Fourth Proportional to 30,945.63, 42,705 and 16,798.47

Step by Step Solution

1. Step 1: Write the proportion equation
   30,945.63 : 42,705 = 16,798.47 : x
2. Step 2: Convert to fraction form
   30,945.63/42,705 = 16,798.47/x
3. Step 3: Cross multiply
   30,945.63x = 42,705 × 16,798.47
4. Step 4: Simplify right side
   30,945.63x = 717,378,661.35
5. Step 5: Solve for x
   x = 717,378,661.35/30,945.63
6. Step 6: Final answer
   x = 23,181.91