Finding the Fourth Proportional to 166,639.50, 229,962.54 and 91,188

Step by Step Solution

1. Step 1: Write the proportion equation
   166,639.50 : 229,962.54 = 91,188 : x
2. Step 2: Convert to fraction form
   166,639.50/229,962.54 = 91,188/x
3. Step 3: Cross multiply
   166,639.50x = 229,962.54 × 91,188
4. Step 4: Simplify right side
   166,639.50x = 20,969,824,097.52
5. Step 5: Solve for x
   x = 20,969,824,097.52/166,639.50
6. Step 6: Final answer
   x = 125,839.46