Finding the Fourth Proportional to 3,439.60, 5,158.42 and 974.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,439.60 : 5,158.42 = 974.67 : x
2. Step 2: Convert to fraction form
   3,439.60/5,158.42 = 974.67/x
3. Step 3: Cross multiply
   3,439.60x = 5,158.42 × 974.67
4. Step 4: Simplify right side
   3,439.60x = 5,027,764.46
5. Step 5: Solve for x
   x = 5,027,764.46/3,439.60
6. Step 6: Final answer
   x = 1,461.73