Finding the Fourth Proportional to 166,018.71, 229,105.53 and 90,567.21

Step by Step Solution

1. Step 1: Write the proportion equation
   166,018.71 : 229,105.53 = 90,567.21 : x
2. Step 2: Convert to fraction form
   166,018.71/229,105.53 = 90,567.21/x
3. Step 3: Cross multiply
   166,018.71x = 229,105.53 × 90,567.21
4. Step 4: Simplify right side
   166,018.71x = 20,749,448,647.67
5. Step 5: Solve for x
   x = 20,749,448,647.67/166,018.71
6. Step 6: Final answer
   x = 124,982.59