Finding the Fourth Proportional to 139,065.74, 208,506.42 and 50,307.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,065.74 : 208,506.42 = 50,307.56 : x
2. Step 2: Convert to fraction form
   139,065.74/208,506.42 = 50,307.56/x
3. Step 3: Cross multiply
   139,065.74x = 208,506.42 × 50,307.56
4. Step 4: Simplify right side
   139,065.74x = 10,489,449,234.54
5. Step 5: Solve for x
   x = 10,489,449,234.54/139,065.74
6. Step 6: Final answer
   x = 75,427.99