Finding the Fourth Proportional to 139,993.91, 193,186.78 and 79,563.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,993.91 : 193,186.78 = 79,563.50 : x
2. Step 2: Convert to fraction form
   139,993.91/193,186.78 = 79,563.50/x
3. Step 3: Cross multiply
   139,993.91x = 193,186.78 × 79,563.50
4. Step 4: Simplify right side
   139,993.91x = 15,370,615,006.78
5. Step 5: Solve for x
   x = 15,370,615,006.78/139,993.91
6. Step 6: Final answer
   x = 109,794.89