Finding the Fourth Proportional to 31,011.84, 42,796.50 and 16,864.70

Step by Step Solution

1. Step 1: Write the proportion equation
   31,011.84 : 42,796.50 = 16,864.70 : x
2. Step 2: Convert to fraction form
   31,011.84/42,796.50 = 16,864.70/x
3. Step 3: Cross multiply
   31,011.84x = 42,796.50 × 16,864.70
4. Step 4: Simplify right side
   31,011.84x = 721,749,919.57
5. Step 5: Solve for x
   x = 721,749,919.57/31,011.84
6. Step 6: Final answer
   x = 23,273.37