Finding the Fourth Proportional to 166,623, 229,939.74 and 91,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,623 : 229,939.74 = 91,171.50 : x
2. Step 2: Convert to fraction form
   166,623/229,939.74 = 91,171.50/x
3. Step 3: Cross multiply
   166,623x = 229,939.74 × 91,171.50
4. Step 4: Simplify right side
   166,623x = 20,963,951,005.41
5. Step 5: Solve for x
   x = 20,963,951,005.41/166,623
6. Step 6: Final answer
   x = 125,816.67