Finding the Fourth Proportional to 139,156, 192,035.28 and 78,725.44

Step by Step Solution

1. Step 1: Write the proportion equation
   139,156 : 192,035.28 = 78,725.44 : x
2. Step 2: Convert to fraction form
   139,156/192,035.28 = 78,725.44/x
3. Step 3: Cross multiply
   139,156x = 192,035.28 × 78,725.44
4. Step 4: Simplify right side
   139,156x = 15,118,061,913.52
5. Step 5: Solve for x
   x = 15,118,061,913.52/139,156
6. Step 6: Final answer
   x = 108,641.11