Finding the Fourth Proportional to 1,991.34, 2,987.49 and 675.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.34 : 2,987.49 = 675.07 : x
2. Step 2: Convert to fraction form
   1,991.34/2,987.49 = 675.07/x
3. Step 3: Cross multiply
   1,991.34x = 2,987.49 × 675.07
4. Step 4: Simplify right side
   1,991.34x = 2,016,761.50
5. Step 5: Solve for x
   x = 2,016,761.50/1,991.34
6. Step 6: Final answer
   x = 1,012.77