Finding the Fourth Proportional to 139,491.15, 192,590.43 and 107,168.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,491.15 : 192,590.43 = 107,168.16 : x
2. Step 2: Convert to fraction form
   139,491.15/192,590.43 = 107,168.16/x
3. Step 3: Cross multiply
   139,491.15x = 192,590.43 × 107,168.16
4. Step 4: Simplify right side
   139,491.15x = 20,639,562,016.71
5. Step 5: Solve for x
   x = 20,639,562,016.71/139,491.15
6. Step 6: Final answer
   x = 147,963.24