Finding the Fourth Proportional to 139,772.72, 192,889.49 and 79,337.67

Step by Step Solution

1. Step 1: Write the proportion equation
   139,772.72 : 192,889.49 = 79,337.67 : x
2. Step 2: Convert to fraction form
   139,772.72/192,889.49 = 79,337.67/x
3. Step 3: Cross multiply
   139,772.72x = 192,889.49 × 79,337.67
4. Step 4: Simplify right side
   139,772.72x = 15,303,402,307.40
5. Step 5: Solve for x
   x = 15,303,402,307.40/139,772.72
6. Step 6: Final answer
   x = 109,487.77