Finding the Fourth Proportional to 139,248.81, 208,808.42 and 50,498.73

Step by Step Solution

1. Step 1: Write the proportion equation
   139,248.81 : 208,808.42 = 50,498.73 : x
2. Step 2: Convert to fraction form
   139,248.81/208,808.42 = 50,498.73/x
3. Step 3: Cross multiply
   139,248.81x = 208,808.42 × 50,498.73
4. Step 4: Simplify right side
   139,248.81x = 10,544,560,837.90
5. Step 5: Solve for x
   x = 10,544,560,837.90/139,248.81
6. Step 6: Final answer
   x = 75,724.60