Finding the Fourth Proportional to 1,456.18, 2,181.53 and 762.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.18 : 2,181.53 = 762.72 : x
2. Step 2: Convert to fraction form
   1,456.18/2,181.53 = 762.72/x
3. Step 3: Cross multiply
   1,456.18x = 2,181.53 × 762.72
4. Step 4: Simplify right side
   1,456.18x = 1,663,890.29
5. Step 5: Solve for x
   x = 1,663,890.29/1,456.18
6. Step 6: Final answer
   x = 1,142.64