Finding the Fourth Proportional to 166,212, 229,373.78 and 90,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,212 : 229,373.78 = 90,760.50 : x
2. Step 2: Convert to fraction form
   166,212/229,373.78 = 90,760.50/x
3. Step 3: Cross multiply
   166,212x = 229,373.78 × 90,760.50
4. Step 4: Simplify right side
   166,212x = 20,818,078,505.89
5. Step 5: Solve for x
   x = 20,818,078,505.89/166,212
6. Step 6: Final answer
   x = 125,250.15