Finding the Fourth Proportional to 139,185.48, 208,798.68 and 50,418.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,185.48 : 208,798.68 = 50,418.12 : x
2. Step 2: Convert to fraction form
   139,185.48/208,798.68 = 50,418.12/x
3. Step 3: Cross multiply
   139,185.48x = 208,798.68 × 50,418.12
4. Step 4: Simplify right side
   139,185.48x = 10,527,236,904.08
5. Step 5: Solve for x
   x = 10,527,236,904.08/139,185.48
6. Step 6: Final answer
   x = 75,634.59