Finding the Fourth Proportional to 1,018.45, 1,404.13 and 1,004.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.45 : 1,404.13 = 1,004.68 : x
2. Step 2: Convert to fraction form
   1,018.45/1,404.13 = 1,004.68/x
3. Step 3: Cross multiply
   1,018.45x = 1,404.13 × 1,004.68
4. Step 4: Simplify right side
   1,018.45x = 1,410,701.33
5. Step 5: Solve for x
   x = 1,410,701.33/1,018.45
6. Step 6: Final answer
   x = 1,385.15