Finding the Fourth Proportional to 139,448.81, 192,439.27 and 75,786.62

Step by Step Solution

1. Step 1: Write the proportion equation
   139,448.81 : 192,439.27 = 75,786.62 : x
2. Step 2: Convert to fraction form
   139,448.81/192,439.27 = 75,786.62/x
3. Step 3: Cross multiply
   139,448.81x = 192,439.27 × 75,786.62
4. Step 4: Simplify right side
   139,448.81x = 14,584,321,828.57
5. Step 5: Solve for x
   x = 14,584,321,828.57/139,448.81
6. Step 6: Final answer
   x = 104,585.49