Finding the Fourth Proportional to 1,991.73, 2,985.54 and 675.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.73 : 2,985.54 = 675.05 : x
2. Step 2: Convert to fraction form
   1,991.73/2,985.54 = 675.05/x
3. Step 3: Cross multiply
   1,991.73x = 2,985.54 × 675.05
4. Step 4: Simplify right side
   1,991.73x = 2,015,388.78
5. Step 5: Solve for x
   x = 2,015,388.78/1,991.73
6. Step 6: Final answer
   x = 1,011.88