Finding the Fourth Proportional to 1,018.32, 1,519.21 and 943.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.32 : 1,519.21 = 943.89 : x
2. Step 2: Convert to fraction form
   1,018.32/1,519.21 = 943.89/x
3. Step 3: Cross multiply
   1,018.32x = 1,519.21 × 943.89
4. Step 4: Simplify right side
   1,018.32x = 1,433,967.13
5. Step 5: Solve for x
   x = 1,433,967.13/1,018.32
6. Step 6: Final answer
   x = 1,408.17