Finding the Fourth Proportional to 1,018.72, 1,404.24 and 852.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.72 : 1,404.24 = 852.64 : x
2. Step 2: Convert to fraction form
   1,018.72/1,404.24 = 852.64/x
3. Step 3: Cross multiply
   1,018.72x = 1,404.24 × 852.64
4. Step 4: Simplify right side
   1,018.72x = 1,197,311.19
5. Step 5: Solve for x
   x = 1,197,311.19/1,018.72
6. Step 6: Final answer
   x = 1,175.31