Finding the Fourth Proportional to 11,847.43, 17,765.18 and 3,947.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,847.43 : 17,765.18 = 3,947.15 : x
2. Step 2: Convert to fraction form
   11,847.43/17,765.18 = 3,947.15/x
3. Step 3: Cross multiply
   11,847.43x = 17,765.18 × 3,947.15
4. Step 4: Simplify right side
   11,847.43x = 70,121,751.28
5. Step 5: Solve for x
   x = 70,121,751.28/11,847.43
6. Step 6: Final answer
   x = 5,918.73