Finding the Fourth Proportional to 166,456.50, 229,710.78 and 91,005

Step by Step Solution

1. Step 1: Write the proportion equation
   166,456.50 : 229,710.78 = 91,005 : x
2. Step 2: Convert to fraction form
   166,456.50/229,710.78 = 91,005/x
3. Step 3: Cross multiply
   166,456.50x = 229,710.78 × 91,005
4. Step 4: Simplify right side
   166,456.50x = 20,904,829,533.90
5. Step 5: Solve for x
   x = 20,904,829,533.90/166,456.50
6. Step 6: Final answer
   x = 125,587.34