Finding the Fourth Proportional to 139,868.38, 209,802.75 and 106,776.31

Step by Step Solution

1. Step 1: Write the proportion equation
   139,868.38 : 209,802.75 = 106,776.31 : x
2. Step 2: Convert to fraction form
   139,868.38/209,802.75 = 106,776.31/x
3. Step 3: Cross multiply
   139,868.38x = 209,802.75 × 106,776.31
4. Step 4: Simplify right side
   139,868.38x = 22,401,963,472.85
5. Step 5: Solve for x
   x = 22,401,963,472.85/139,868.38
6. Step 6: Final answer
   x = 160,164.60