Finding the Fourth Proportional to 1,962.28, 2,706.82 and 1,225

Step by Step Solution

1. Step 1: Write the proportion equation
   1,962.28 : 2,706.82 = 1,225 : x
2. Step 2: Convert to fraction form
   1,962.28/2,706.82 = 1,225/x
3. Step 3: Cross multiply
   1,962.28x = 2,706.82 × 1,225
4. Step 4: Simplify right side
   1,962.28x = 3,315,854.50
5. Step 5: Solve for x
   x = 3,315,854.50/1,962.28
6. Step 6: Final answer
   x = 1,689.80