Finding the Fourth Proportional to 139,504.28, 209,143.72 and 49,497.38

Step by Step Solution

1. Step 1: Write the proportion equation
   139,504.28 : 209,143.72 = 49,497.38 : x
2. Step 2: Convert to fraction form
   139,504.28/209,143.72 = 49,497.38/x
3. Step 3: Cross multiply
   139,504.28x = 209,143.72 × 49,497.38
4. Step 4: Simplify right side
   139,504.28x = 10,352,065,983.90
5. Step 5: Solve for x
   x = 10,352,065,983.90/139,504.28
6. Step 6: Final answer
   x = 74,206.08