Finding the Fourth Proportional to 139,064.62, 208,473.20 and 50,298.38

Step by Step Solution

1. Step 1: Write the proportion equation
   139,064.62 : 208,473.20 = 50,298.38 : x
2. Step 2: Convert to fraction form
   139,064.62/208,473.20 = 50,298.38/x
3. Step 3: Cross multiply
   139,064.62x = 208,473.20 × 50,298.38
4. Step 4: Simplify right side
   139,064.62x = 10,485,864,233.42
5. Step 5: Solve for x
   x = 10,485,864,233.42/139,064.62
6. Step 6: Final answer
   x = 75,402.82