Finding the Fourth Proportional to 2,609.60, 3,604.70 and 1,945.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,609.60 : 3,604.70 = 1,945.30 : x
2. Step 2: Convert to fraction form
   2,609.60/3,604.70 = 1,945.30/x
3. Step 3: Cross multiply
   2,609.60x = 3,604.70 × 1,945.30
4. Step 4: Simplify right side
   2,609.60x = 7,012,222.91
5. Step 5: Solve for x
   x = 7,012,222.91/2,609.60
6. Step 6: Final answer
   x = 2,687.09