Finding the Fourth Proportional to 1,986.34, 2,740.75 and 1,200.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.34 : 2,740.75 = 1,200.43 : x
2. Step 2: Convert to fraction form
   1,986.34/2,740.75 = 1,200.43/x
3. Step 3: Cross multiply
   1,986.34x = 2,740.75 × 1,200.43
4. Step 4: Simplify right side
   1,986.34x = 3,290,078.52
5. Step 5: Solve for x
   x = 3,290,078.52/1,986.34
6. Step 6: Final answer
   x = 1,656.35