Finding the Fourth Proportional to 139,074.54, 208,519.64 and 50,316.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,074.54 : 208,519.64 = 50,316.50 : x
2. Step 2: Convert to fraction form
   139,074.54/208,519.64 = 50,316.50/x
3. Step 3: Cross multiply
   139,074.54x = 208,519.64 × 50,316.50
4. Step 4: Simplify right side
   139,074.54x = 10,491,977,171.88
5. Step 5: Solve for x
   x = 10,491,977,171.88/139,074.54
6. Step 6: Final answer
   x = 75,441.39