Finding the Fourth Proportional to 139,388.34, 192,342.03 and 78,946.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,388.34 : 192,342.03 = 78,946.92 : x
2. Step 2: Convert to fraction form
   139,388.34/192,342.03 = 78,946.92/x
3. Step 3: Cross multiply
   139,388.34x = 192,342.03 × 78,946.92
4. Step 4: Simplify right side
   139,388.34x = 15,184,810,855.05
5. Step 5: Solve for x
   x = 15,184,810,855.05/139,388.34
6. Step 6: Final answer
   x = 108,938.89