Finding the Fourth Proportional to 139,488.42, 192,489.96 and 79,064.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,488.42 : 192,489.96 = 79,064.62 : x
2. Step 2: Convert to fraction form
   139,488.42/192,489.96 = 79,064.62/x
3. Step 3: Cross multiply
   139,488.42x = 192,489.96 × 79,064.62
4. Step 4: Simplify right side
   139,488.42x = 15,219,145,541.22
5. Step 5: Solve for x
   x = 15,219,145,541.22/139,488.42
6. Step 6: Final answer
   x = 109,106.87