Finding the Fourth Proportional to 13,191.68, 19,788.55 and 3,831.85

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.68 : 19,788.55 = 3,831.85 : x
2. Step 2: Convert to fraction form
   13,191.68/19,788.55 = 3,831.85/x
3. Step 3: Cross multiply
   13,191.68x = 19,788.55 × 3,831.85
4. Step 4: Simplify right side
   13,191.68x = 75,826,755.32
5. Step 5: Solve for x
   x = 75,826,755.32/13,191.68
6. Step 6: Final answer
   x = 5,748.07