Finding the Fourth Proportional to 1,991.84, 2,986.61 and 675.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.84 : 2,986.61 = 675.15 : x
2. Step 2: Convert to fraction form
   1,991.84/2,986.61 = 675.15/x
3. Step 3: Cross multiply
   1,991.84x = 2,986.61 × 675.15
4. Step 4: Simplify right side
   1,991.84x = 2,016,406.37
5. Step 5: Solve for x
   x = 2,016,406.37/1,991.84
6. Step 6: Final answer
   x = 1,012.34