Finding the Fourth Proportional to 31,015, 42,800.70 and 17,581.96

Step by Step Solution

1. Step 1: Write the proportion equation
   31,015 : 42,800.70 = 17,581.96 : x
2. Step 2: Convert to fraction form
   31,015/42,800.70 = 17,581.96/x
3. Step 3: Cross multiply
   31,015x = 42,800.70 × 17,581.96
4. Step 4: Simplify right side
   31,015x = 752,520,195.37
5. Step 5: Solve for x
   x = 752,520,195.37/31,015
6. Step 6: Final answer
   x = 24,263.10