Finding the Fourth Proportional to 111,962.18, 154,518.72 and 83,618.66

Step by Step Solution

1. Step 1: Write the proportion equation
   111,962.18 : 154,518.72 = 83,618.66 : x
2. Step 2: Convert to fraction form
   111,962.18/154,518.72 = 83,618.66/x
3. Step 3: Cross multiply
   111,962.18x = 154,518.72 × 83,618.66
4. Step 4: Simplify right side
   111,962.18x = 12,920,648,311.32
5. Step 5: Solve for x
   x = 12,920,648,311.32/111,962.18
6. Step 6: Final answer
   x = 115,401.90