Finding the Fourth Proportional to 2,103.93, 2,902.86 and 1,219.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.93 : 2,902.86 = 1,219.20 : x
2. Step 2: Convert to fraction form
   2,103.93/2,902.86 = 1,219.20/x
3. Step 3: Cross multiply
   2,103.93x = 2,902.86 × 1,219.20
4. Step 4: Simplify right side
   2,103.93x = 3,539,166.91
5. Step 5: Solve for x
   x = 3,539,166.91/2,103.93
6. Step 6: Final answer
   x = 1,682.17