Finding the Fourth Proportional to 111,217.15, 166,826.55 and 89,002.09

Step by Step Solution

1. Step 1: Write the proportion equation
   111,217.15 : 166,826.55 = 89,002.09 : x
2. Step 2: Convert to fraction form
   111,217.15/166,826.55 = 89,002.09/x
3. Step 3: Cross multiply
   111,217.15x = 166,826.55 × 89,002.09
4. Step 4: Simplify right side
   111,217.15x = 14,847,911,617.49
5. Step 5: Solve for x
   x = 14,847,911,617.49/111,217.15
6. Step 6: Final answer
   x = 133,503.80