Finding the Fourth Proportional to 139,819.34, 192,957.52 and 79,388.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,819.34 : 192,957.52 = 79,388.89 : x
2. Step 2: Convert to fraction form
   139,819.34/192,957.52 = 79,388.89/x
3. Step 3: Cross multiply
   139,819.34x = 192,957.52 × 79,388.89
4. Step 4: Simplify right side
   139,819.34x = 15,318,683,329.95
5. Step 5: Solve for x
   x = 15,318,683,329.95/139,819.34
6. Step 6: Final answer
   x = 109,560.55