Finding the Fourth Proportional to 1,017.12, 1,410.60 and 953.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,017.12 : 1,410.60 = 953.76 : x
2. Step 2: Convert to fraction form
   1,017.12/1,410.60 = 953.76/x
3. Step 3: Cross multiply
   1,017.12x = 1,410.60 × 953.76
4. Step 4: Simplify right side
   1,017.12x = 1,345,373.86
5. Step 5: Solve for x
   x = 1,345,373.86/1,017.12
6. Step 6: Final answer
   x = 1,322.73