Finding the Fourth Proportional to 8,485.25, 12,711.31 and 5,554.67

Step by Step Solution

1. Step 1: Write the proportion equation
   8,485.25 : 12,711.31 = 5,554.67 : x
2. Step 2: Convert to fraction form
   8,485.25/12,711.31 = 5,554.67/x
3. Step 3: Cross multiply
   8,485.25x = 12,711.31 × 5,554.67
4. Step 4: Simplify right side
   8,485.25x = 70,607,065.29
5. Step 5: Solve for x
   x = 70,607,065.29/8,485.25
6. Step 6: Final answer
   x = 8,321.16