Finding the Fourth Proportional to 139,595.49, 209,462.43 and 55,353.85

Step by Step Solution

1. Step 1: Write the proportion equation
   139,595.49 : 209,462.43 = 55,353.85 : x
2. Step 2: Convert to fraction form
   139,595.49/209,462.43 = 55,353.85/x
3. Step 3: Cross multiply
   139,595.49x = 209,462.43 × 55,353.85
4. Step 4: Simplify right side
   139,595.49x = 11,594,551,930.86
5. Step 5: Solve for x
   x = 11,594,551,930.86/139,595.49
6. Step 6: Final answer
   x = 83,058.21