Finding the Fourth Proportional to 139,542.49, 192,573.71 and 79,938.01

Step by Step Solution

1. Step 1: Write the proportion equation
   139,542.49 : 192,573.71 = 79,938.01 : x
2. Step 2: Convert to fraction form
   139,542.49/192,573.71 = 79,938.01/x
3. Step 3: Cross multiply
   139,542.49x = 192,573.71 × 79,938.01
4. Step 4: Simplify right side
   139,542.49x = 15,393,959,155.72
5. Step 5: Solve for x
   x = 15,393,959,155.72/139,542.49
6. Step 6: Final answer
   x = 110,317.36