Finding the Fourth Proportional to 139,631.07, 209,377.38 and 49,660.29

Step by Step Solution

1. Step 1: Write the proportion equation
   139,631.07 : 209,377.38 = 49,660.29 : x
2. Step 2: Convert to fraction form
   139,631.07/209,377.38 = 49,660.29/x
3. Step 3: Cross multiply
   139,631.07x = 209,377.38 × 49,660.29
4. Step 4: Simplify right side
   139,631.07x = 10,397,741,410.24
5. Step 5: Solve for x
   x = 10,397,741,410.24/139,631.07
6. Step 6: Final answer
   x = 74,465.81