Finding the Fourth Proportional to 5,546.31, 7,643.39 and 3,971.67

Step by Step Solution

1. Step 1: Write the proportion equation
   5,546.31 : 7,643.39 = 3,971.67 : x
2. Step 2: Convert to fraction form
   5,546.31/7,643.39 = 3,971.67/x
3. Step 3: Cross multiply
   5,546.31x = 7,643.39 × 3,971.67
4. Step 4: Simplify right side
   5,546.31x = 30,357,002.90
5. Step 5: Solve for x
   x = 30,357,002.90/5,546.31
6. Step 6: Final answer
   x = 5,473.37