Finding the Fourth Proportional to 139,265.30, 192,190.38 and 78,834.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,265.30 : 192,190.38 = 78,834.72 : x
2. Step 2: Convert to fraction form
   139,265.30/192,190.38 = 78,834.72/x
3. Step 3: Cross multiply
   139,265.30x = 192,190.38 × 78,834.72
4. Step 4: Simplify right side
   139,265.30x = 15,151,274,793.99
5. Step 5: Solve for x
   x = 15,151,274,793.99/139,265.30
6. Step 6: Final answer
   x = 108,794.33