Finding the Fourth Proportional to 139,491.72, 192,502.56 and 85,047.03

Step by Step Solution

1. Step 1: Write the proportion equation
   139,491.72 : 192,502.56 = 85,047.03 : x
2. Step 2: Convert to fraction form
   139,491.72/192,502.56 = 85,047.03/x
3. Step 3: Cross multiply
   139,491.72x = 192,502.56 × 85,047.03
4. Step 4: Simplify right side
   139,491.72x = 16,371,770,995.40
5. Step 5: Solve for x
   x = 16,371,770,995.40/139,491.72
6. Step 6: Final answer
   x = 117,367.33