Finding the Fourth Proportional to 2,205.58, 3,043.68 and 1,210.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.58 : 3,043.68 = 1,210.87 : x
2. Step 2: Convert to fraction form
   2,205.58/3,043.68 = 1,210.87/x
3. Step 3: Cross multiply
   2,205.58x = 3,043.68 × 1,210.87
4. Step 4: Simplify right side
   2,205.58x = 3,685,500.80
5. Step 5: Solve for x
   x = 3,685,500.80/2,205.58
6. Step 6: Final answer
   x = 1,670.99