Finding the Fourth Proportional to 11,767.90, 17,651.30 and 3,976.78

Step by Step Solution

1. Step 1: Write the proportion equation
   11,767.90 : 17,651.30 = 3,976.78 : x
2. Step 2: Convert to fraction form
   11,767.90/17,651.30 = 3,976.78/x
3. Step 3: Cross multiply
   11,767.90x = 17,651.30 × 3,976.78
4. Step 4: Simplify right side
   11,767.90x = 70,195,258.50
5. Step 5: Solve for x
   x = 70,195,258.50/11,767.90
6. Step 6: Final answer
   x = 5,964.98