Finding the Fourth Proportional to 129,395.69, 178,524.83 and 72,796.13

Step by Step Solution

1. Step 1: Write the proportion equation
   129,395.69 : 178,524.83 = 72,796.13 : x
2. Step 2: Convert to fraction form
   129,395.69/178,524.83 = 72,796.13/x
3. Step 3: Cross multiply
   129,395.69x = 178,524.83 × 72,796.13
4. Step 4: Simplify right side
   129,395.69x = 12,995,915,476.30
5. Step 5: Solve for x
   x = 12,995,915,476.30/129,395.69
6. Step 6: Final answer
   x = 100,435.46