Finding the Fourth Proportional to 2,002.10, 3,002.70 and 1,313.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,002.10 : 3,002.70 = 1,313.60 : x
2. Step 2: Convert to fraction form
   2,002.10/3,002.70 = 1,313.60/x
3. Step 3: Cross multiply
   2,002.10x = 3,002.70 × 1,313.60
4. Step 4: Simplify right side
   2,002.10x = 3,944,346.72
5. Step 5: Solve for x
   x = 3,944,346.72/2,002.10
6. Step 6: Final answer
   x = 1,970.10