Finding the Fourth Proportional to 3,450.34, 5,174.72 and 985.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,450.34 : 5,174.72 = 985.10 : x
2. Step 2: Convert to fraction form
   3,450.34/5,174.72 = 985.10/x
3. Step 3: Cross multiply
   3,450.34x = 5,174.72 × 985.10
4. Step 4: Simplify right side
   3,450.34x = 5,097,616.67
5. Step 5: Solve for x
   x = 5,097,616.67/3,450.34
6. Step 6: Final answer
   x = 1,477.42