Finding the Fourth Proportional to 3,572.40, 5,357.76 and 974.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,572.40 : 5,357.76 = 974.72 : x
2. Step 2: Convert to fraction form
   3,572.40/5,357.76 = 974.72/x
3. Step 3: Cross multiply
   3,572.40x = 5,357.76 × 974.72
4. Step 4: Simplify right side
   3,572.40x = 5,222,315.83
5. Step 5: Solve for x
   x = 5,222,315.83/3,572.40
6. Step 6: Final answer
   x = 1,461.85