Finding the Fourth Proportional to 139,727.94, 209,574.56 and 39,896.88

Step by Step Solution

1. Step 1: Write the proportion equation
   139,727.94 : 209,574.56 = 39,896.88 : x
2. Step 2: Convert to fraction form
   139,727.94/209,574.56 = 39,896.88/x
3. Step 3: Cross multiply
   139,727.94x = 209,574.56 × 39,896.88
4. Step 4: Simplify right side
   139,727.94x = 8,361,371,071.37
5. Step 5: Solve for x
   x = 8,361,371,071.37/139,727.94
6. Step 6: Final answer
   x = 59,840.37