Finding the Fourth Proportional to 31,116.96, 42,940.94 and 16,969.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,116.96 : 42,940.94 = 16,969.50 : x
2. Step 2: Convert to fraction form
   31,116.96/42,940.94 = 16,969.50/x
3. Step 3: Cross multiply
   31,116.96x = 42,940.94 × 16,969.50
4. Step 4: Simplify right side
   31,116.96x = 728,686,196.48
5. Step 5: Solve for x
   x = 728,686,196.48/31,116.96
6. Step 6: Final answer
   x = 23,417.65