Finding the Fourth Proportional to 31,011.96, 42,796.30 and 16,864.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,011.96 : 42,796.30 = 16,864.81 : x
2. Step 2: Convert to fraction form
   31,011.96/42,796.30 = 16,864.81/x
3. Step 3: Cross multiply
   31,011.96x = 42,796.30 × 16,864.81
4. Step 4: Simplify right side
   31,011.96x = 721,751,350.67
5. Step 5: Solve for x
   x = 721,751,350.67/31,011.96
6. Step 6: Final answer
   x = 23,273.32