Finding the Fourth Proportional to 12,121, 18,181.72 and 3,800.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,121 : 18,181.72 = 3,800.83 : x
2. Step 2: Convert to fraction form
   12,121/18,181.72 = 3,800.83/x
3. Step 3: Cross multiply
   12,121x = 18,181.72 × 3,800.83
4. Step 4: Simplify right side
   12,121x = 69,105,626.83
5. Step 5: Solve for x
   x = 69,105,626.83/12,121
6. Step 6: Final answer
   x = 5,701.31