Finding the Fourth Proportional to 139,122.72, 208,700.56 and 50,418.08

Step by Step Solution

1. Step 1: Write the proportion equation
   139,122.72 : 208,700.56 = 50,418.08 : x
2. Step 2: Convert to fraction form
   139,122.72/208,700.56 = 50,418.08/x
3. Step 3: Cross multiply
   139,122.72x = 208,700.56 × 50,418.08
4. Step 4: Simplify right side
   139,122.72x = 10,522,281,530.12
5. Step 5: Solve for x
   x = 10,522,281,530.12/139,122.72
6. Step 6: Final answer
   x = 75,633.09