Finding the Fourth Proportional to 9,686.58, 13,368.71 and 5,708.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,686.58 : 13,368.71 = 5,708.06 : x
2. Step 2: Convert to fraction form
   9,686.58/13,368.71 = 5,708.06/x
3. Step 3: Cross multiply
   9,686.58x = 13,368.71 × 5,708.06
4. Step 4: Simplify right side
   9,686.58x = 76,309,398.80
5. Step 5: Solve for x
   x = 76,309,398.80/9,686.58
6. Step 6: Final answer
   x = 7,877.85