Finding the Fourth Proportional to 1,986.59, 2,741.06 and 1,200.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.59 : 2,741.06 = 1,200.62 : x
2. Step 2: Convert to fraction form
   1,986.59/2,741.06 = 1,200.62/x
3. Step 3: Cross multiply
   1,986.59x = 2,741.06 × 1,200.62
4. Step 4: Simplify right side
   1,986.59x = 3,290,981.31
5. Step 5: Solve for x
   x = 3,290,981.31/1,986.59
6. Step 6: Final answer
   x = 1,656.60