Finding the Fourth Proportional to 166,658.40, 229,986.72 and 91,206

Step by Step Solution

1. Step 1: Write the proportion equation
   166,658.40 : 229,986.72 = 91,206 : x
2. Step 2: Convert to fraction form
   166,658.40/229,986.72 = 91,206/x
3. Step 3: Cross multiply
   166,658.40x = 229,986.72 × 91,206
4. Step 4: Simplify right side
   166,658.40x = 20,976,168,784.32
5. Step 5: Solve for x
   x = 20,976,168,784.32/166,658.40
6. Step 6: Final answer
   x = 125,863.26