Finding the Fourth Proportional to 139,707.06, 192,800.70 and 79,280.25

Step by Step Solution

1. Step 1: Write the proportion equation
   139,707.06 : 192,800.70 = 79,280.25 : x
2. Step 2: Convert to fraction form
   139,707.06/192,800.70 = 79,280.25/x
3. Step 3: Cross multiply
   139,707.06x = 192,800.70 × 79,280.25
4. Step 4: Simplify right side
   139,707.06x = 15,285,287,696.18
5. Step 5: Solve for x
   x = 15,285,287,696.18/139,707.06
6. Step 6: Final answer
   x = 109,409.56