Finding the Fourth Proportional to 111,777.50, 167,666.68 and 106,171.50

Step by Step Solution

1. Step 1: Write the proportion equation
   111,777.50 : 167,666.68 = 106,171.50 : x
2. Step 2: Convert to fraction form
   111,777.50/167,666.68 = 106,171.50/x
3. Step 3: Cross multiply
   111,777.50x = 167,666.68 × 106,171.50
4. Step 4: Simplify right side
   111,777.50x = 17,801,422,915.62
5. Step 5: Solve for x
   x = 17,801,422,915.62/111,777.50
6. Step 6: Final answer
   x = 159,257.66