Finding the Fourth Proportional to 139,288.80, 209,016.18 and 50,549.22

Step by Step Solution

1. Step 1: Write the proportion equation
   139,288.80 : 209,016.18 = 50,549.22 : x
2. Step 2: Convert to fraction form
   139,288.80/209,016.18 = 50,549.22/x
3. Step 3: Cross multiply
   139,288.80x = 209,016.18 × 50,549.22
4. Step 4: Simplify right side
   139,288.80x = 10,565,604,866.38
5. Step 5: Solve for x
   x = 10,565,604,866.38/139,288.80
6. Step 6: Final answer
   x = 75,853.94