Finding the Fourth Proportional to 1,127.12, 1,686.72 and 953.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,127.12 : 1,686.72 = 953.36 : x
2. Step 2: Convert to fraction form
   1,127.12/1,686.72 = 953.36/x
3. Step 3: Cross multiply
   1,127.12x = 1,686.72 × 953.36
4. Step 4: Simplify right side
   1,127.12x = 1,608,051.38
5. Step 5: Solve for x
   x = 1,608,051.38/1,127.12
6. Step 6: Final answer
   x = 1,426.69