Finding the Fourth Proportional to 8,675.31, 11,971.46 and 5,089.78

Step by Step Solution

1. Step 1: Write the proportion equation
   8,675.31 : 11,971.46 = 5,089.78 : x
2. Step 2: Convert to fraction form
   8,675.31/11,971.46 = 5,089.78/x
3. Step 3: Cross multiply
   8,675.31x = 11,971.46 × 5,089.78
4. Step 4: Simplify right side
   8,675.31x = 60,932,080.47
5. Step 5: Solve for x
   x = 60,932,080.47/8,675.31
6. Step 6: Final answer
   x = 7,023.62