Finding the Fourth Proportional to 139,976.27, 209,902.63 and 40,113.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,976.27 : 209,902.63 = 40,113.80 : x
2. Step 2: Convert to fraction form
   139,976.27/209,902.63 = 40,113.80/x
3. Step 3: Cross multiply
   139,976.27x = 209,902.63 × 40,113.80
4. Step 4: Simplify right side
   139,976.27x = 8,419,990,969.50
5. Step 5: Solve for x
   x = 8,419,990,969.50/139,976.27
6. Step 6: Final answer
   x = 60,152.99