Finding the Fourth Proportional to 13,243.86, 19,862.78 and 3,881.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,243.86 : 19,862.78 = 3,881.60 : x
2. Step 2: Convert to fraction form
   13,243.86/19,862.78 = 3,881.60/x
3. Step 3: Cross multiply
   13,243.86x = 19,862.78 × 3,881.60
4. Step 4: Simplify right side
   13,243.86x = 77,099,366.85
5. Step 5: Solve for x
   x = 77,099,366.85/13,243.86
6. Step 6: Final answer
   x = 5,821.52