Finding the Fourth Proportional to 3,439.89, 5,160.12 and 974.94

Step by Step Solution

1. Step 1: Write the proportion equation
   3,439.89 : 5,160.12 = 974.94 : x
2. Step 2: Convert to fraction form
   3,439.89/5,160.12 = 974.94/x
3. Step 3: Cross multiply
   3,439.89x = 5,160.12 × 974.94
4. Step 4: Simplify right side
   3,439.89x = 5,030,807.39
5. Step 5: Solve for x
   x = 5,030,807.39/3,439.89
6. Step 6: Final answer
   x = 1,462.49