Finding the Fourth Proportional to 1,892.50, 2,609.97 and 1,228.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,892.50 : 2,609.97 = 1,228.72 : x
2. Step 2: Convert to fraction form
   1,892.50/2,609.97 = 1,228.72/x
3. Step 3: Cross multiply
   1,892.50x = 2,609.97 × 1,228.72
4. Step 4: Simplify right side
   1,892.50x = 3,206,922.34
5. Step 5: Solve for x
   x = 3,206,922.34/1,892.50
6. Step 6: Final answer
   x = 1,694.54