Finding the Fourth Proportional to 1,216.16, 1,676.46 and 953.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216.16 : 1,676.46 = 953.72 : x
2. Step 2: Convert to fraction form
   1,216.16/1,676.46 = 953.72/x
3. Step 3: Cross multiply
   1,216.16x = 1,676.46 × 953.72
4. Step 4: Simplify right side
   1,216.16x = 1,598,873.43
5. Step 5: Solve for x
   x = 1,598,873.43/1,216.16
6. Step 6: Final answer
   x = 1,314.69