Finding the Fourth Proportional to 1,991.82, 2,987.82 and 693.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,991.82 : 2,987.82 = 693.39 : x
2. Step 2: Convert to fraction form
   1,991.82/2,987.82 = 693.39/x
3. Step 3: Cross multiply
   1,991.82x = 2,987.82 × 693.39
4. Step 4: Simplify right side
   1,991.82x = 2,071,724.51
5. Step 5: Solve for x
   x = 2,071,724.51/1,991.82
6. Step 6: Final answer
   x = 1,040.12