Finding the Fourth Proportional to 139,019.05, 208,537.40 and 49,050.55

Step by Step Solution

1. Step 1: Write the proportion equation
   139,019.05 : 208,537.40 = 49,050.55 : x
2. Step 2: Convert to fraction form
   139,019.05/208,537.40 = 49,050.55/x
3. Step 3: Cross multiply
   139,019.05x = 208,537.40 × 49,050.55
4. Step 4: Simplify right side
   139,019.05x = 10,228,874,165.57
5. Step 5: Solve for x
   x = 10,228,874,165.57/139,019.05
6. Step 6: Final answer
   x = 73,578.94