Finding the Fourth Proportional to 139,429.75, 192,407.79 and 75,766.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,429.75 : 192,407.79 = 75,766.18 : x
2. Step 2: Convert to fraction form
   139,429.75/192,407.79 = 75,766.18/x
3. Step 3: Cross multiply
   139,429.75x = 192,407.79 × 75,766.18
4. Step 4: Simplify right side
   139,429.75x = 14,578,003,250.54
5. Step 5: Solve for x
   x = 14,578,003,250.54/139,429.75
6. Step 6: Final answer
   x = 104,554.47