Finding the Fourth Proportional to 138,850.78, 208,233.07 and 50,092.72

Step by Step Solution

1. Step 1: Write the proportion equation
   138,850.78 : 208,233.07 = 50,092.72 : x
2. Step 2: Convert to fraction form
   138,850.78/208,233.07 = 50,092.72/x
3. Step 3: Cross multiply
   138,850.78x = 208,233.07 × 50,092.72
4. Step 4: Simplify right side
   138,850.78x = 10,430,960,870.25
5. Step 5: Solve for x
   x = 10,430,960,870.25/138,850.78
6. Step 6: Final answer
   x = 75,123.53