Finding the Fourth Proportional to 31,009, 42,792.42 and 16,861.82

Step by Step Solution

1. Step 1: Write the proportion equation
   31,009 : 42,792.42 = 16,861.82 : x
2. Step 2: Convert to fraction form
   31,009/42,792.42 = 16,861.82/x
3. Step 3: Cross multiply
   31,009x = 42,792.42 × 16,861.82
4. Step 4: Simplify right side
   31,009x = 721,558,083.40
5. Step 5: Solve for x
   x = 721,558,083.40/31,009
6. Step 6: Final answer
   x = 23,269.31