Finding the Fourth Proportional to 139,989.34, 193,185.34 and 79,558.43

Step by Step Solution

1. Step 1: Write the proportion equation
   139,989.34 : 193,185.34 = 79,558.43 : x
2. Step 2: Convert to fraction form
   139,989.34/193,185.34 = 79,558.43/x
3. Step 3: Cross multiply
   139,989.34x = 193,185.34 × 79,558.43
4. Step 4: Simplify right side
   139,989.34x = 15,369,521,184.59
5. Step 5: Solve for x
   x = 15,369,521,184.59/139,989.34
6. Step 6: Final answer
   x = 109,790.65