Finding the Fourth Proportional to 259,673.99, 389,554.04 and 91,150.61

Step by Step Solution

1. Step 1: Write the proportion equation
   259,673.99 : 389,554.04 = 91,150.61 : x
2. Step 2: Convert to fraction form
   259,673.99/389,554.04 = 91,150.61/x
3. Step 3: Cross multiply
   259,673.99x = 389,554.04 × 91,150.61
4. Step 4: Simplify right side
   259,673.99x = 35,508,086,654.07
5. Step 5: Solve for x
   x = 35,508,086,654.07/259,673.99
6. Step 6: Final answer
   x = 136,741.02