Finding the Fourth Proportional to 139,818.34, 192,956.14 and 79,387.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,818.34 : 192,956.14 = 79,387.89 : x
2. Step 2: Convert to fraction form
   139,818.34/192,956.14 = 79,387.89/x
3. Step 3: Cross multiply
   139,818.34x = 192,956.14 × 79,387.89
4. Step 4: Simplify right side
   139,818.34x = 15,318,380,817.14
5. Step 5: Solve for x
   x = 15,318,380,817.14/139,818.34
6. Step 6: Final answer
   x = 109,559.17