Finding the Fourth Proportional to 1,986.22, 2,980.05 and 1,012.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.22 : 2,980.05 = 1,012.42 : x
2. Step 2: Convert to fraction form
   1,986.22/2,980.05 = 1,012.42/x
3. Step 3: Cross multiply
   1,986.22x = 2,980.05 × 1,012.42
4. Step 4: Simplify right side
   1,986.22x = 3,017,062.22
5. Step 5: Solve for x
   x = 3,017,062.22/1,986.22
6. Step 6: Final answer
   x = 1,519.00