Finding the Fourth Proportional to 139,018.05, 208,535.90 and 49,049.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,018.05 : 208,535.90 = 49,049.55 : x
2. Step 2: Convert to fraction form
   139,018.05/208,535.90 = 49,049.55/x
3. Step 3: Cross multiply
   139,018.05x = 208,535.90 × 49,049.55
4. Step 4: Simplify right side
   139,018.05x = 10,228,591,808.60
5. Step 5: Solve for x
   x = 10,228,591,808.60/139,018.05
6. Step 6: Final answer
   x = 73,577.44