Finding the Fourth Proportional to 139,064.72, 208,613.40 and 50,360.08

Step by Step Solution

1. Step 1: Write the proportion equation
   139,064.72 : 208,613.40 = 50,360.08 : x
2. Step 2: Convert to fraction form
   139,064.72/208,613.40 = 50,360.08/x
3. Step 3: Cross multiply
   139,064.72x = 208,613.40 × 50,360.08
4. Step 4: Simplify right side
   139,064.72x = 10,505,787,513.07
5. Step 5: Solve for x
   x = 10,505,787,513.07/139,064.72
6. Step 6: Final answer
   x = 75,546.03