Finding the Fourth Proportional to 1,986.98, 2,743.18 and 1,485.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,986.98 : 2,743.18 = 1,485.60 : x
2. Step 2: Convert to fraction form
   1,986.98/2,743.18 = 1,485.60/x
3. Step 3: Cross multiply
   1,986.98x = 2,743.18 × 1,485.60
4. Step 4: Simplify right side
   1,986.98x = 4,075,268.21
5. Step 5: Solve for x
   x = 4,075,268.21/1,986.98
6. Step 6: Final answer
   x = 2,050.99