Finding the Fourth Proportional to 139,849.50, 192,985.56 and 79,412.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,849.50 : 192,985.56 = 79,412.16 : x
2. Step 2: Convert to fraction form
   139,849.50/192,985.56 = 79,412.16/x
3. Step 3: Cross multiply
   139,849.50x = 192,985.56 × 79,412.16
4. Step 4: Simplify right side
   139,849.50x = 15,325,400,168.41
5. Step 5: Solve for x
   x = 15,325,400,168.41/139,849.50
6. Step 6: Final answer
   x = 109,584.95