Finding the Fourth Proportional to 91,022.67, 136,544.94 and 86,046.03

Step by Step Solution

1. Step 1: Write the proportion equation
   91,022.67 : 136,544.94 = 86,046.03 : x
2. Step 2: Convert to fraction form
   91,022.67/136,544.94 = 86,046.03/x
3. Step 3: Cross multiply
   91,022.67x = 136,544.94 × 86,046.03
4. Step 4: Simplify right side
   91,022.67x = 11,749,150,003.59
5. Step 5: Solve for x
   x = 11,749,150,003.59/91,022.67
6. Step 6: Final answer
   x = 129,079.38