Finding the Fourth Proportional to 2,103.18, 2,902.89 and 1,219.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.18 : 2,902.89 = 1,219.47 : x
2. Step 2: Convert to fraction form
   2,103.18/2,902.89 = 1,219.47/x
3. Step 3: Cross multiply
   2,103.18x = 2,902.89 × 1,219.47
4. Step 4: Simplify right side
   2,103.18x = 3,539,987.27
5. Step 5: Solve for x
   x = 3,539,987.27/2,103.18
6. Step 6: Final answer
   x = 1,683.16