Finding the Fourth Proportional to 31,093.20, 42,908.77 and 17,665.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,093.20 : 42,908.77 = 17,665.20 : x
2. Step 2: Convert to fraction form
   31,093.20/42,908.77 = 17,665.20/x
3. Step 3: Cross multiply
   31,093.20x = 42,908.77 × 17,665.20
4. Step 4: Simplify right side
   31,093.20x = 757,992,003.80
5. Step 5: Solve for x
   x = 757,992,003.80/31,093.20
6. Step 6: Final answer
   x = 24,378.06