Finding the Fourth Proportional to 30,807.77, 42,514.71 and 16,660.61

Step by Step Solution

1. Step 1: Write the proportion equation
   30,807.77 : 42,514.71 = 16,660.61 : x
2. Step 2: Convert to fraction form
   30,807.77/42,514.71 = 16,660.61/x
3. Step 3: Cross multiply
   30,807.77x = 42,514.71 × 16,660.61
4. Step 4: Simplify right side
   30,807.77x = 708,321,076.81
5. Step 5: Solve for x
   x = 708,321,076.81/30,807.77
6. Step 6: Final answer
   x = 22,991.64