Finding the Fourth Proportional to 166,978.72, 230,433.42 and 90,500.26

Step by Step Solution

1. Step 1: Write the proportion equation
   166,978.72 : 230,433.42 = 90,500.26 : x
2. Step 2: Convert to fraction form
   166,978.72/230,433.42 = 90,500.26/x
3. Step 3: Cross multiply
   166,978.72x = 230,433.42 × 90,500.26
4. Step 4: Simplify right side
   166,978.72x = 20,854,284,422.69
5. Step 5: Solve for x
   x = 20,854,284,422.69/166,978.72
6. Step 6: Final answer
   x = 124,891.87