Finding the Fourth Proportional to 166,136.22, 229,267.91 and 90,684.72

Step by Step Solution

1. Step 1: Write the proportion equation
   166,136.22 : 229,267.91 = 90,684.72 : x
2. Step 2: Convert to fraction form
   166,136.22/229,267.91 = 90,684.72/x
3. Step 3: Cross multiply
   166,136.22x = 229,267.91 × 90,684.72
4. Step 4: Simplify right side
   166,136.22x = 20,791,096,223.34
5. Step 5: Solve for x
   x = 20,791,096,223.34/166,136.22
6. Step 6: Final answer
   x = 125,144.87