Finding the Fourth Proportional to 166,621, 229,936.98 and 91,169.50

Step by Step Solution

1. Step 1: Write the proportion equation
   166,621 : 229,936.98 = 91,169.50 : x
2. Step 2: Convert to fraction form
   166,621/229,936.98 = 91,169.50/x
3. Step 3: Cross multiply
   166,621x = 229,936.98 × 91,169.50
4. Step 4: Simplify right side
   166,621x = 20,963,239,498.11
5. Step 5: Solve for x
   x = 20,963,239,498.11/166,621
6. Step 6: Final answer
   x = 125,813.91