Finding the Fourth Proportional to 129,665, 178,953.54 and 73,086.68

Step by Step Solution

1. Step 1: Write the proportion equation
   129,665 : 178,953.54 = 73,086.68 : x
2. Step 2: Convert to fraction form
   129,665/178,953.54 = 73,086.68/x
3. Step 3: Cross multiply
   129,665x = 178,953.54 × 73,086.68
4. Step 4: Simplify right side
   129,665x = 13,079,120,112.85
5. Step 5: Solve for x
   x = 13,079,120,112.85/129,665
6. Step 6: Final answer
   x = 100,868.55