Finding the Fourth Proportional to 2,012.10, 3,017.70 and 1,323.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,012.10 : 3,017.70 = 1,323.60 : x
2. Step 2: Convert to fraction form
   2,012.10/3,017.70 = 1,323.60/x
3. Step 3: Cross multiply
   2,012.10x = 3,017.70 × 1,323.60
4. Step 4: Simplify right side
   2,012.10x = 3,994,227.72
5. Step 5: Solve for x
   x = 3,994,227.72/2,012.10
6. Step 6: Final answer
   x = 1,985.10