Finding the Fourth Proportional to 139,487.94, 192,514.41 and 85,071.69

Step by Step Solution

1. Step 1: Write the proportion equation
   139,487.94 : 192,514.41 = 85,071.69 : x
2. Step 2: Convert to fraction form
   139,487.94/192,514.41 = 85,071.69/x
3. Step 3: Cross multiply
   139,487.94x = 192,514.41 × 85,071.69
4. Step 4: Simplify right side
   139,487.94x = 16,377,526,208.05
5. Step 5: Solve for x
   x = 16,377,526,208.05/139,487.94
6. Step 6: Final answer
   x = 117,411.77