Finding the Fourth Proportional to 2,084.20, 2,876.15 and 1,245.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,084.20 : 2,876.15 = 1,245.09 : x
2. Step 2: Convert to fraction form
   2,084.20/2,876.15 = 1,245.09/x
3. Step 3: Cross multiply
   2,084.20x = 2,876.15 × 1,245.09
4. Step 4: Simplify right side
   2,084.20x = 3,581,065.60
5. Step 5: Solve for x
   x = 3,581,065.60/2,084.20
6. Step 6: Final answer
   x = 1,718.20