Finding the Fourth Proportional to 139,584.12, 192,823.38 and 108,158.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,584.12 : 192,823.38 = 108,158.28 : x
2. Step 2: Convert to fraction form
   139,584.12/192,823.38 = 108,158.28/x
3. Step 3: Cross multiply
   139,584.12x = 192,823.38 × 108,158.28
4. Step 4: Simplify right side
   139,584.12x = 20,855,445,124.59
5. Step 5: Solve for x
   x = 20,855,445,124.59/139,584.12
6. Step 6: Final answer
   x = 149,411.30