Finding the Fourth Proportional to 1,984.47, 2,740.55 and 1,286.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,984.47 : 2,740.55 = 1,286.25 : x
2. Step 2: Convert to fraction form
   1,984.47/2,740.55 = 1,286.25/x
3. Step 3: Cross multiply
   1,984.47x = 2,740.55 × 1,286.25
4. Step 4: Simplify right side
   1,984.47x = 3,525,026.01
5. Step 5: Solve for x
   x = 3,525,026.01/1,984.47
6. Step 6: Final answer
   x = 1,776.31