Finding the Fourth Proportional to 31,116.42, 42,940.23 and 16,969.26

Step by Step Solution

1. Step 1: Write the proportion equation
   31,116.42 : 42,940.23 = 16,969.26 : x
2. Step 2: Convert to fraction form
   31,116.42/42,940.23 = 16,969.26/x
3. Step 3: Cross multiply
   31,116.42x = 42,940.23 × 16,969.26
4. Step 4: Simplify right side
   31,116.42x = 728,663,927.33
5. Step 5: Solve for x
   x = 728,663,927.33/31,116.42
6. Step 6: Final answer
   x = 23,417.34