Finding the Fourth Proportional to 1,018.41, 1,525.35 and 667.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.41 : 1,525.35 = 667.53 : x
2. Step 2: Convert to fraction form
   1,018.41/1,525.35 = 667.53/x
3. Step 3: Cross multiply
   1,018.41x = 1,525.35 × 667.53
4. Step 4: Simplify right side
   1,018.41x = 1,018,216.89
5. Step 5: Solve for x
   x = 1,018,216.89/1,018.41
6. Step 6: Final answer
   x = 999.81