Finding the Fourth Proportional to 31,136.56, 42,969.40 and 17,709.74

Step by Step Solution

1. Step 1: Write the proportion equation
   31,136.56 : 42,969.40 = 17,709.74 : x
2. Step 2: Convert to fraction form
   31,136.56/42,969.40 = 17,709.74/x
3. Step 3: Cross multiply
   31,136.56x = 42,969.40 × 17,709.74
4. Step 4: Simplify right side
   31,136.56x = 760,976,813.41
5. Step 5: Solve for x
   x = 760,976,813.41/31,136.56
6. Step 6: Final answer
   x = 24,439.98