Finding the Fourth Proportional to 30,798.78, 42,502.41 and 16,651.72

Step by Step Solution

1. Step 1: Write the proportion equation
   30,798.78 : 42,502.41 = 16,651.72 : x
2. Step 2: Convert to fraction form
   30,798.78/42,502.41 = 16,651.72/x
3. Step 3: Cross multiply
   30,798.78x = 42,502.41 × 16,651.72
4. Step 4: Simplify right side
   30,798.78x = 707,738,272.27
5. Step 5: Solve for x
   x = 707,738,272.27/30,798.78
6. Step 6: Final answer
   x = 22,979.43