Finding the Fourth Proportional to 139,784.88, 192,906.96 and 79,358.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,784.88 : 192,906.96 = 79,358.16 : x
2. Step 2: Convert to fraction form
   139,784.88/192,906.96 = 79,358.16/x
3. Step 3: Cross multiply
   139,784.88x = 192,906.96 × 79,358.16
4. Step 4: Simplify right side
   139,784.88x = 15,308,741,396.79
5. Step 5: Solve for x
   x = 15,308,741,396.79/139,784.88
6. Step 6: Final answer
   x = 109,516.43