Finding the Fourth Proportional to 1,993.45, 2,987.61 and 1,069.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,993.45 : 2,987.61 = 1,069.42 : x
2. Step 2: Convert to fraction form
   1,993.45/2,987.61 = 1,069.42/x
3. Step 3: Cross multiply
   1,993.45x = 2,987.61 × 1,069.42
4. Step 4: Simplify right side
   1,993.45x = 3,195,009.89
5. Step 5: Solve for x
   x = 3,195,009.89/1,993.45
6. Step 6: Final answer
   x = 1,602.75