Finding the Fourth Proportional to 5,547.31, 7,644.76 and 3,972.67

Step by Step Solution

1. Step 1: Write the proportion equation
   5,547.31 : 7,644.76 = 3,972.67 : x
2. Step 2: Convert to fraction form
   5,547.31/7,644.76 = 3,972.67/x
3. Step 3: Cross multiply
   5,547.31x = 7,644.76 × 3,972.67
4. Step 4: Simplify right side
   5,547.31x = 30,370,108.71
5. Step 5: Solve for x
   x = 30,370,108.71/5,547.31
6. Step 6: Final answer
   x = 5,474.75