Finding the Fourth Proportional to 139,238, 208,856.68 and 50,491.32

Step by Step Solution

1. Step 1: Write the proportion equation
   139,238 : 208,856.68 = 50,491.32 : x
2. Step 2: Convert to fraction form
   139,238/208,856.68 = 50,491.32/x
3. Step 3: Cross multiply
   139,238x = 208,856.68 × 50,491.32
4. Step 4: Simplify right side
   139,238x = 10,545,449,464.02
5. Step 5: Solve for x
   x = 10,545,449,464.02/139,238
6. Step 6: Final answer
   x = 75,736.86