Finding the Fourth Proportional to 139,769.35, 192,875.78 and 79,338.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,769.35 : 192,875.78 = 79,338.89 : x
2. Step 2: Convert to fraction form
   139,769.35/192,875.78 = 79,338.89/x
3. Step 3: Cross multiply
   139,769.35x = 192,875.78 × 79,338.89
4. Step 4: Simplify right side
   139,769.35x = 15,302,550,973.62
5. Step 5: Solve for x
   x = 15,302,550,973.62/139,769.35
6. Step 6: Final answer
   x = 109,484.31