Finding the Fourth Proportional to 31,020.56, 42,807.86 and 17,222.42

Step by Step Solution

1. Step 1: Write the proportion equation
   31,020.56 : 42,807.86 = 17,222.42 : x
2. Step 2: Convert to fraction form
   31,020.56/42,807.86 = 17,222.42/x
3. Step 3: Cross multiply
   31,020.56x = 42,807.86 × 17,222.42
4. Step 4: Simplify right side
   31,020.56x = 737,254,944.22
5. Step 5: Solve for x
   x = 737,254,944.22/31,020.56
6. Step 6: Final answer
   x = 23,766.65