Finding the Fourth Proportional to 1,451.72, 2,003.16 and 953.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,451.72 : 2,003.16 = 953.40 : x
2. Step 2: Convert to fraction form
   1,451.72/2,003.16 = 953.40/x
3. Step 3: Cross multiply
   1,451.72x = 2,003.16 × 953.40
4. Step 4: Simplify right side
   1,451.72x = 1,909,823.83
5. Step 5: Solve for x
   x = 1,909,823.83/1,451.72
6. Step 6: Final answer
   x = 1,315.56