Finding the Fourth Proportional to 139,764.88, 192,865.78 and 79,336.76

Step by Step Solution

1. Step 1: Write the proportion equation
   139,764.88 : 192,865.78 = 79,336.76 : x
2. Step 2: Convert to fraction form
   139,764.88/192,865.78 = 79,336.76/x
3. Step 3: Cross multiply
   139,764.88x = 192,865.78 × 79,336.76
4. Step 4: Simplify right side
   139,764.88x = 15,301,346,100.07
5. Step 5: Solve for x
   x = 15,301,346,100.07/139,764.88
6. Step 6: Final answer
   x = 109,479.19