Finding the Fourth Proportional to 3,568.76, 5,353.54 and 971.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,568.76 : 5,353.54 = 971.72 : x
2. Step 2: Convert to fraction form
   3,568.76/5,353.54 = 971.72/x
3. Step 3: Cross multiply
   3,568.76x = 5,353.54 × 971.72
4. Step 4: Simplify right side
   3,568.76x = 5,202,141.89
5. Step 5: Solve for x
   x = 5,202,141.89/3,568.76
6. Step 6: Final answer
   x = 1,457.69