Finding the Fourth Proportional to 139,792.89, 192,922.25 and 105,275.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,792.89 : 192,922.25 = 105,275.82 : x
2. Step 2: Convert to fraction form
   139,792.89/192,922.25 = 105,275.82/x
3. Step 3: Cross multiply
   139,792.89x = 192,922.25 × 105,275.82
4. Step 4: Simplify right side
   139,792.89x = 20,310,047,363.57
5. Step 5: Solve for x
   x = 20,310,047,363.57/139,792.89
6. Step 6: Final answer
   x = 145,286.70