Finding the Fourth Proportional to 1,455.72, 2,181.33 and 762.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,455.72 : 2,181.33 = 762.54 : x
2. Step 2: Convert to fraction form
   1,455.72/2,181.33 = 762.54/x
3. Step 3: Cross multiply
   1,455.72x = 2,181.33 × 762.54
4. Step 4: Simplify right side
   1,455.72x = 1,663,351.38
5. Step 5: Solve for x
   x = 1,663,351.38/1,455.72
6. Step 6: Final answer
   x = 1,142.63