Finding the Fourth Proportional to 13,191.43, 19,788.17 and 3,831.60

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.43 : 19,788.17 = 3,831.60 : x
2. Step 2: Convert to fraction form
   13,191.43/19,788.17 = 3,831.60/x
3. Step 3: Cross multiply
   13,191.43x = 19,788.17 × 3,831.60
4. Step 4: Simplify right side
   13,191.43x = 75,820,352.17
5. Step 5: Solve for x
   x = 75,820,352.17/13,191.43
6. Step 6: Final answer
   x = 5,747.70