Finding the Fourth Proportional to 2,209.82, 3,314.50 and 1,385.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,209.82 : 3,314.50 = 1,385.60 : x
2. Step 2: Convert to fraction form
   2,209.82/3,314.50 = 1,385.60/x
3. Step 3: Cross multiply
   2,209.82x = 3,314.50 × 1,385.60
4. Step 4: Simplify right side
   2,209.82x = 4,592,547.70
5. Step 5: Solve for x
   x = 4,592,547.70/2,209.82
6. Step 6: Final answer
   x = 2,078.25