Finding the Fourth Proportional to 139,867, 193,016.46 and 76,204.78

Step by Step Solution

1. Step 1: Write the proportion equation
   139,867 : 193,016.46 = 76,204.78 : x
2. Step 2: Convert to fraction form
   139,867/193,016.46 = 76,204.78/x
3. Step 3: Cross multiply
   139,867x = 193,016.46 × 76,204.78
4. Step 4: Simplify right side
   139,867x = 14,708,776,870.68
5. Step 5: Solve for x
   x = 14,708,776,870.68/139,867
6. Step 6: Final answer
   x = 105,162.60