Finding the Fourth Proportional to 1,222.69, 1,823.73 and 1,025.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,222.69 : 1,823.73 = 1,025.40 : x
2. Step 2: Convert to fraction form
   1,222.69/1,823.73 = 1,025.40/x
3. Step 3: Cross multiply
   1,222.69x = 1,823.73 × 1,025.40
4. Step 4: Simplify right side
   1,222.69x = 1,870,052.74
5. Step 5: Solve for x
   x = 1,870,052.74/1,222.69
6. Step 6: Final answer
   x = 1,529.46