Finding the Fourth Proportional to 1,709.50, 2,566.60 and 1,225.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,709.50 : 2,566.60 = 1,225.30 : x
2. Step 2: Convert to fraction form
   1,709.50/2,566.60 = 1,225.30/x
3. Step 3: Cross multiply
   1,709.50x = 2,566.60 × 1,225.30
4. Step 4: Simplify right side
   1,709.50x = 3,144,854.98
5. Step 5: Solve for x
   x = 3,144,854.98/1,709.50
6. Step 6: Final answer
   x = 1,839.63