Finding the Fourth Proportional to 13,191.80, 19,790.73 and 3,831.98

Step by Step Solution

1. Step 1: Write the proportion equation
   13,191.80 : 19,790.73 = 3,831.98 : x
2. Step 2: Convert to fraction form
   13,191.80/19,790.73 = 3,831.98/x
3. Step 3: Cross multiply
   13,191.80x = 19,790.73 × 3,831.98
4. Step 4: Simplify right side
   13,191.80x = 75,837,582.59
5. Step 5: Solve for x
   x = 75,837,582.59/13,191.80
6. Step 6: Final answer
   x = 5,748.84