Finding the Fourth Proportional to 139,604.38, 209,439.38 and 39,766.01

Step by Step Solution

1. Step 1: Write the proportion equation
   139,604.38 : 209,439.38 = 39,766.01 : x
2. Step 2: Convert to fraction form
   139,604.38/209,439.38 = 39,766.01/x
3. Step 3: Cross multiply
   139,604.38x = 209,439.38 × 39,766.01
4. Step 4: Simplify right side
   139,604.38x = 8,328,567,531.69
5. Step 5: Solve for x
   x = 8,328,567,531.69/139,604.38
6. Step 6: Final answer
   x = 59,658.36