Finding the Fourth Proportional to 131,786.82, 181,866.15 and 71,358.21

Step by Step Solution

1. Step 1: Write the proportion equation
   131,786.82 : 181,866.15 = 71,358.21 : x
2. Step 2: Convert to fraction form
   131,786.82/181,866.15 = 71,358.21/x
3. Step 3: Cross multiply
   131,786.82x = 181,866.15 × 71,358.21
4. Step 4: Simplify right side
   131,786.82x = 12,977,642,923.59
5. Step 5: Solve for x
   x = 12,977,642,923.59/131,786.82
6. Step 6: Final answer
   x = 98,474.51