Finding the Fourth Proportional to 139,548.87, 209,348.42 and 50,926.77

Step by Step Solution

1. Step 1: Write the proportion equation
   139,548.87 : 209,348.42 = 50,926.77 : x
2. Step 2: Convert to fraction form
   139,548.87/209,348.42 = 50,926.77/x
3. Step 3: Cross multiply
   139,548.87x = 209,348.42 × 50,926.77
4. Step 4: Simplify right side
   139,548.87x = 10,661,438,580.57
5. Step 5: Solve for x
   x = 10,661,438,580.57/139,548.87
6. Step 6: Final answer
   x = 76,399.32