Finding the Fourth Proportional to 139,735.76, 192,802.56 and 79,292.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,735.76 : 192,802.56 = 79,292.72 : x
2. Step 2: Convert to fraction form
   139,735.76/192,802.56 = 79,292.72/x
3. Step 3: Cross multiply
   139,735.76x = 192,802.56 × 79,292.72
4. Step 4: Simplify right side
   139,735.76x = 15,287,839,405.36
5. Step 5: Solve for x
   x = 15,287,839,405.36/139,735.76
6. Step 6: Final answer
   x = 109,405.35