Finding the Fourth Proportional to 139,150.75, 192,028.52 and 75,489

Step by Step Solution

1. Step 1: Write the proportion equation
   139,150.75 : 192,028.52 = 75,489 : x
2. Step 2: Convert to fraction form
   139,150.75/192,028.52 = 75,489/x
3. Step 3: Cross multiply
   139,150.75x = 192,028.52 × 75,489
4. Step 4: Simplify right side
   139,150.75x = 14,496,040,946.28
5. Step 5: Solve for x
   x = 14,496,040,946.28/139,150.75
6. Step 6: Final answer
   x = 104,175.08