Finding the Fourth Proportional to 31,457, 47,192.79 and 10,680.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,457 : 47,192.79 = 10,680.50 : x
2. Step 2: Convert to fraction form
   31,457/47,192.79 = 10,680.50/x
3. Step 3: Cross multiply
   31,457x = 47,192.79 × 10,680.50
4. Step 4: Simplify right side
   31,457x = 504,042,593.60
5. Step 5: Solve for x
   x = 504,042,593.60/31,457
6. Step 6: Final answer
   x = 16,023.23