Finding the Fourth Proportional to 139,568.60, 209,321.46 and 39,726.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139,568.60 : 209,321.46 = 39,726.59 : x
2. Step 2: Convert to fraction form
   139,568.60/209,321.46 = 39,726.59/x
3. Step 3: Cross multiply
   139,568.60x = 209,321.46 × 39,726.59
4. Step 4: Simplify right side
   139,568.60x = 8,315,626,773.01
5. Step 5: Solve for x
   x = 8,315,626,773.01/139,568.60
6. Step 6: Final answer
   x = 59,580.93