Finding the Fourth Proportional to 166,429.50, 229,673.53 and 90,978

Step by Step Solution

1. Step 1: Write the proportion equation
   166,429.50 : 229,673.53 = 90,978 : x
2. Step 2: Convert to fraction form
   166,429.50/229,673.53 = 90,978/x
3. Step 3: Cross multiply
   166,429.50x = 229,673.53 × 90,978
4. Step 4: Simplify right side
   166,429.50x = 20,895,238,412.34
5. Step 5: Solve for x
   x = 20,895,238,412.34/166,429.50
6. Step 6: Final answer
   x = 125,550.09