Finding the Fourth Proportional to 12,786.85, 19,182.34 and 3,781.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,786.85 : 19,182.34 = 3,781.87 : x
2. Step 2: Convert to fraction form
   12,786.85/19,182.34 = 3,781.87/x
3. Step 3: Cross multiply
   12,786.85x = 19,182.34 × 3,781.87
4. Step 4: Simplify right side
   12,786.85x = 72,545,116.18
5. Step 5: Solve for x
   x = 72,545,116.18/12,786.85
6. Step 6: Final answer
   x = 5,673.42