Finding the Fourth Proportional to 139,542.66, 209,369.88 and 50,802.30

Step by Step Solution

1. Step 1: Write the proportion equation
   139,542.66 : 209,369.88 = 50,802.30 : x
2. Step 2: Convert to fraction form
   139,542.66/209,369.88 = 50,802.30/x
3. Step 3: Cross multiply
   139,542.66x = 209,369.88 × 50,802.30
4. Step 4: Simplify right side
   139,542.66x = 10,636,471,454.72
5. Step 5: Solve for x
   x = 10,636,471,454.72/139,542.66
6. Step 6: Final answer
   x = 76,223.80