Finding the Fourth Proportional to 139,019.55, 208,538.15 and 49,051.05

Step by Step Solution

1. Step 1: Write the proportion equation
   139,019.55 : 208,538.15 = 49,051.05 : x
2. Step 2: Convert to fraction form
   139,019.55/208,538.15 = 49,051.05/x
3. Step 3: Cross multiply
   139,019.55x = 208,538.15 × 49,051.05
4. Step 4: Simplify right side
   139,019.55x = 10,229,015,222.56
5. Step 5: Solve for x
   x = 10,229,015,222.56/139,019.55
6. Step 6: Final answer
   x = 73,579.69