Finding the Fourth Proportional to 139,568.48, 209,321.27 and 39,726.46

Step by Step Solution

1. Step 1: Write the proportion equation
   139,568.48 : 209,321.27 = 39,726.46 : x
2. Step 2: Convert to fraction form
   139,568.48/209,321.27 = 39,726.46/x
3. Step 3: Cross multiply
   139,568.48x = 209,321.27 × 39,726.46
4. Step 4: Simplify right side
   139,568.48x = 8,315,593,059.80
5. Step 5: Solve for x
   x = 8,315,593,059.80/139,568.48
6. Step 6: Final answer
   x = 59,580.74