Finding the Fourth Proportional to 139,789.40, 192,902.51 and 79,351.95

Step by Step Solution

1. Step 1: Write the proportion equation
   139,789.40 : 192,902.51 = 79,351.95 : x
2. Step 2: Convert to fraction form
   139,789.40/192,902.51 = 79,351.95/x
3. Step 3: Cross multiply
   139,789.40x = 192,902.51 × 79,351.95
4. Step 4: Simplify right side
   139,789.40x = 15,307,191,250.16
5. Step 5: Solve for x
   x = 15,307,191,250.16/139,789.40
6. Step 6: Final answer
   x = 109,501.81