Finding the Fourth Proportional to 139,446.72, 209,095.83 and 55,203.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,446.72 : 209,095.83 = 55,203.48 : x
2. Step 2: Convert to fraction form
   139,446.72/209,095.83 = 55,203.48/x
3. Step 3: Cross multiply
   139,446.72x = 209,095.83 × 55,203.48
4. Step 4: Simplify right side
   139,446.72x = 11,542,817,469.49
5. Step 5: Solve for x
   x = 11,542,817,469.49/139,446.72
6. Step 6: Final answer
   x = 82,775.83