Finding the Fourth Proportional to 111,158.72, 166,615.76 and 54,915.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111,158.72 : 166,615.76 = 54,915.56 : x
2. Step 2: Convert to fraction form
   111,158.72/166,615.76 = 54,915.56/x
3. Step 3: Cross multiply
   111,158.72x = 166,615.76 × 54,915.56
4. Step 4: Simplify right side
   111,158.72x = 9,149,797,765.23
5. Step 5: Solve for x
   x = 9,149,797,765.23/111,158.72
6. Step 6: Final answer
   x = 82,312.91