Finding the Fourth Proportional to 139,568.86, 209,321.83 and 39,726.84

Step by Step Solution

1. Step 1: Write the proportion equation
   139,568.86 : 209,321.83 = 39,726.84 : x
2. Step 2: Convert to fraction form
   139,568.86/209,321.83 = 39,726.84/x
3. Step 3: Cross multiply
   139,568.86x = 209,321.83 × 39,726.84
4. Step 4: Simplify right side
   139,568.86x = 8,315,694,848.92
5. Step 5: Solve for x
   x = 8,315,694,848.92/139,568.86
6. Step 6: Final answer
   x = 59,581.31