Finding the Fourth Proportional to 31,116.63, 42,940.94 and 16,969.57

Step by Step Solution

1. Step 1: Write the proportion equation
   31,116.63 : 42,940.94 = 16,969.57 : x
2. Step 2: Convert to fraction form
   31,116.63/42,940.94 = 16,969.57/x
3. Step 3: Cross multiply
   31,116.63x = 42,940.94 × 16,969.57
4. Step 4: Simplify right side
   31,116.63x = 728,689,287.20
5. Step 5: Solve for x
   x = 728,689,287.20/31,116.63
6. Step 6: Final answer
   x = 23,418.00