Finding the Fourth Proportional to 31,136.49, 42,969.31 and 17,709.68

Step by Step Solution

1. Step 1: Write the proportion equation
   31,136.49 : 42,969.31 = 17,709.68 : x
2. Step 2: Convert to fraction form
   31,136.49/42,969.31 = 17,709.68/x
3. Step 3: Cross multiply
   31,136.49x = 42,969.31 × 17,709.68
4. Step 4: Simplify right side
   31,136.49x = 760,972,685.65
5. Step 5: Solve for x
   x = 760,972,685.65/31,136.49
6. Step 6: Final answer
   x = 24,439.90