Finding the Fourth Proportional to 139,743.31, 192,836.03 and 79,315.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,743.31 : 192,836.03 = 79,315.18 : x
2. Step 2: Convert to fraction form
   139,743.31/192,836.03 = 79,315.18/x
3. Step 3: Cross multiply
   139,743.31x = 192,836.03 × 79,315.18
4. Step 4: Simplify right side
   139,743.31x = 15,294,824,429.94
5. Step 5: Solve for x
   x = 15,294,824,429.94/139,743.31
6. Step 6: Final answer
   x = 109,449.42