Finding the Fourth Proportional to 139,404.76, 208,980.42 and 50,620.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,404.76 : 208,980.42 = 50,620.12 : x
2. Step 2: Convert to fraction form
   139,404.76/208,980.42 = 50,620.12/x
3. Step 3: Cross multiply
   139,404.76x = 208,980.42 × 50,620.12
4. Step 4: Simplify right side
   139,404.76x = 10,578,613,938.05
5. Step 5: Solve for x
   x = 10,578,613,938.05/139,404.76
6. Step 6: Final answer
   x = 75,884.17