Finding the Fourth Proportional to 30,810.72, 42,518.79 and 16,663.56

Step by Step Solution

1. Step 1: Write the proportion equation
   30,810.72 : 42,518.79 = 16,663.56 : x
2. Step 2: Convert to fraction form
   30,810.72/42,518.79 = 16,663.56/x
3. Step 3: Cross multiply
   30,810.72x = 42,518.79 × 16,663.56
4. Step 4: Simplify right side
   30,810.72x = 708,514,556.25
5. Step 5: Solve for x
   x = 708,514,556.25/30,810.72
6. Step 6: Final answer
   x = 22,995.72