Finding the Fourth Proportional to 139,364.50, 192,402.78 and 91,756.24

Step by Step Solution

1. Step 1: Write the proportion equation
   139,364.50 : 192,402.78 = 91,756.24 : x
2. Step 2: Convert to fraction form
   139,364.50/192,402.78 = 91,756.24/x
3. Step 3: Cross multiply
   139,364.50x = 192,402.78 × 91,756.24
4. Step 4: Simplify right side
   139,364.50x = 17,654,155,658.35
5. Step 5: Solve for x
   x = 17,654,155,658.35/139,364.50
6. Step 6: Final answer
   x = 126,676.13