Finding the Fourth Proportional to 139,743.76, 192,813.60 and 79,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,743.76 : 192,813.60 = 79,300.72 : x
2. Step 2: Convert to fraction form
   139,743.76/192,813.60 = 79,300.72/x
3. Step 3: Cross multiply
   139,743.76x = 192,813.60 × 79,300.72
4. Step 4: Simplify right side
   139,743.76x = 15,290,257,305.79
5. Step 5: Solve for x
   x = 15,290,257,305.79/139,743.76
6. Step 6: Final answer
   x = 109,416.39