Finding the Fourth Proportional to 139,406.82, 209,118.15 and 39,559.11

Step by Step Solution

1. Step 1: Write the proportion equation
   139,406.82 : 209,118.15 = 39,559.11 : x
2. Step 2: Convert to fraction form
   139,406.82/209,118.15 = 39,559.11/x
3. Step 3: Cross multiply
   139,406.82x = 209,118.15 × 39,559.11
4. Step 4: Simplify right side
   139,406.82x = 8,272,527,898.85
5. Step 5: Solve for x
   x = 8,272,527,898.85/139,406.82
6. Step 6: Final answer
   x = 59,340.91