Finding the Fourth Proportional to 139,062.72, 208,610.40 and 50,358.08

Step by Step Solution

1. Step 1: Write the proportion equation
   139,062.72 : 208,610.40 = 50,358.08 : x
2. Step 2: Convert to fraction form
   139,062.72/208,610.40 = 50,358.08/x
3. Step 3: Cross multiply
   139,062.72x = 208,610.40 × 50,358.08
4. Step 4: Simplify right side
   139,062.72x = 10,505,219,212.03
5. Step 5: Solve for x
   x = 10,505,219,212.03/139,062.72
6. Step 6: Final answer
   x = 75,543.03