Finding the Fourth Proportional to 139,932.74, 193,112.43 and 79,513.67

Step by Step Solution

1. Step 1: Write the proportion equation
   139,932.74 : 193,112.43 = 79,513.67 : x
2. Step 2: Convert to fraction form
   139,932.74/193,112.43 = 79,513.67/x
3. Step 3: Cross multiply
   139,932.74x = 193,112.43 × 79,513.67
4. Step 4: Simplify right side
   139,932.74x = 15,355,078,031.92
5. Step 5: Solve for x
   x = 15,355,078,031.92/139,932.74
6. Step 6: Final answer
   x = 109,731.85