Finding the Fourth Proportional to 139,885.94, 193,036.55 and 79,456.40

Step by Step Solution

1. Step 1: Write the proportion equation
   139,885.94 : 193,036.55 = 79,456.40 : x
2. Step 2: Convert to fraction form
   139,885.94/193,036.55 = 79,456.40/x
3. Step 3: Cross multiply
   139,885.94x = 193,036.55 × 79,456.40
4. Step 4: Simplify right side
   139,885.94x = 15,337,987,968.96
5. Step 5: Solve for x
   x = 15,337,987,968.96/139,885.94
6. Step 6: Final answer
   x = 109,646.39