Finding the Fourth Proportional to 13,221.89, 19,834.70 and 3,862.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,221.89 : 19,834.70 = 3,862.60 : x
2. Step 2: Convert to fraction form
   13,221.89/19,834.70 = 3,862.60/x
3. Step 3: Cross multiply
   13,221.89x = 19,834.70 × 3,862.60
4. Step 4: Simplify right side
   13,221.89x = 76,613,443.32
5. Step 5: Solve for x
   x = 76,613,443.32/13,221.89
6. Step 6: Final answer
   x = 5,794.44