Finding the Fourth Proportional to 139,435.27, 192,420.15 and 79,017.42

Step by Step Solution

1. Step 1: Write the proportion equation
   139,435.27 : 192,420.15 = 79,017.42 : x
2. Step 2: Convert to fraction form
   139,435.27/192,420.15 = 79,017.42/x
3. Step 3: Cross multiply
   139,435.27x = 192,420.15 × 79,017.42
4. Step 4: Simplify right side
   139,435.27x = 15,204,543,809.01
5. Step 5: Solve for x
   x = 15,204,543,809.01/139,435.27
6. Step 6: Final answer
   x = 109,043.75