Finding the Fourth Proportional to 166,019.71, 229,106.91 and 90,568.21

Step by Step Solution

1. Step 1: Write the proportion equation
   166,019.71 : 229,106.91 = 90,568.21 : x
2. Step 2: Convert to fraction form
   166,019.71/229,106.91 = 90,568.21/x
3. Step 3: Cross multiply
   166,019.71x = 229,106.91 × 90,568.21
4. Step 4: Simplify right side
   166,019.71x = 20,749,802,737.33
5. Step 5: Solve for x
   x = 20,749,802,737.33/166,019.71
6. Step 6: Final answer
   x = 124,983.97