Finding the Fourth Proportional to 139,290.80, 209,019.18 and 50,551.22

Step by Step Solution

1. Step 1: Write the proportion equation
   139,290.80 : 209,019.18 = 50,551.22 : x
2. Step 2: Convert to fraction form
   139,290.80/209,019.18 = 50,551.22/x
3. Step 3: Cross multiply
   139,290.80x = 209,019.18 × 50,551.22
4. Step 4: Simplify right side
   139,290.80x = 10,566,174,552.40
5. Step 5: Solve for x
   x = 10,566,174,552.40/139,290.80
6. Step 6: Final answer
   x = 75,856.94