Finding the Fourth Proportional to 139,408.06, 209,111.16 and 39,568.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,408.06 : 209,111.16 = 39,568.31 : x
2. Step 2: Convert to fraction form
   139,408.06/209,111.16 = 39,568.31/x
3. Step 3: Cross multiply
   139,408.06x = 209,111.16 × 39,568.31
4. Step 4: Simplify right side
   139,408.06x = 8,274,175,203.34
5. Step 5: Solve for x
   x = 8,274,175,203.34/139,408.06
6. Step 6: Final answer
   x = 59,352.20