Finding the Fourth Proportional to 139,273.76, 192,195.72 and 78,855.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,273.76 : 192,195.72 = 78,855.92 : x
2. Step 2: Convert to fraction form
   139,273.76/192,195.72 = 78,855.92/x
3. Step 3: Cross multiply
   139,273.76x = 192,195.72 × 78,855.92
4. Step 4: Simplify right side
   139,273.76x = 15,155,770,320.66
5. Step 5: Solve for x
   x = 15,155,770,320.66/139,273.76
6. Step 6: Final answer
   x = 108,820.00