Finding the Fourth Proportional to 12,191.33, 18,280.16 and 3,869.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,191.33 : 18,280.16 = 3,869.80 : x
2. Step 2: Convert to fraction form
   12,191.33/18,280.16 = 3,869.80/x
3. Step 3: Cross multiply
   12,191.33x = 18,280.16 × 3,869.80
4. Step 4: Simplify right side
   12,191.33x = 70,740,452.42
5. Step 5: Solve for x
   x = 70,740,452.42/12,191.33
6. Step 6: Final answer
   x = 5,802.52