Finding the Fourth Proportional to 166,568.76, 229,880.72 and 91,128.60

Step by Step Solution

1. Step 1: Write the proportion equation
   166,568.76 : 229,880.72 = 91,128.60 : x
2. Step 2: Convert to fraction form
   166,568.76/229,880.72 = 91,128.60/x
3. Step 3: Cross multiply
   166,568.76x = 229,880.72 × 91,128.60
4. Step 4: Simplify right side
   166,568.76x = 20,948,708,180.59
5. Step 5: Solve for x
   x = 20,948,708,180.59/166,568.76
6. Step 6: Final answer
   x = 125,766.13