Finding the Fourth Proportional to 139,494.89, 192,498.93 and 79,071.12

Step by Step Solution

1. Step 1: Write the proportion equation
   139,494.89 : 192,498.93 = 79,071.12 : x
2. Step 2: Convert to fraction form
   139,494.89/192,498.93 = 79,071.12/x
3. Step 3: Cross multiply
   139,494.89x = 192,498.93 × 79,071.12
4. Step 4: Simplify right side
   139,494.89x = 15,221,105,993.90
5. Step 5: Solve for x
   x = 15,221,105,993.90/139,494.89
6. Step 6: Final answer
   x = 109,115.87