Finding the Fourth Proportional to 1,412.40, 1,945.08 and 1,018.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,412.40 : 1,945.08 = 1,018.80 : x
2. Step 2: Convert to fraction form
   1,412.40/1,945.08 = 1,018.80/x
3. Step 3: Cross multiply
   1,412.40x = 1,945.08 × 1,018.80
4. Step 4: Simplify right side
   1,412.40x = 1,981,647.50
5. Step 5: Solve for x
   x = 1,981,647.50/1,412.40
6. Step 6: Final answer
   x = 1,403.04