Finding the Fourth Proportional to 1,446.72, 2,168.64 and 762.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.72 : 2,168.64 = 762.72 : x
2. Step 2: Convert to fraction form
   1,446.72/2,168.64 = 762.72/x
3. Step 3: Cross multiply
   1,446.72x = 2,168.64 × 762.72
4. Step 4: Simplify right side
   1,446.72x = 1,654,065.10
5. Step 5: Solve for x
   x = 1,654,065.10/1,446.72
6. Step 6: Final answer
   x = 1,143.32