Finding the Fourth Proportional to 139,020.55, 208,539.65 and 49,052.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,020.55 : 208,539.65 = 49,052.05 : x
2. Step 2: Convert to fraction form
   139,020.55/208,539.65 = 49,052.05/x
3. Step 3: Cross multiply
   139,020.55x = 208,539.65 × 49,052.05
4. Step 4: Simplify right side
   139,020.55x = 10,229,297,338.78
5. Step 5: Solve for x
   x = 10,229,297,338.78/139,020.55
6. Step 6: Final answer
   x = 73,581.19