Finding the Fourth Proportional to 1,072.91, 1,608.12 and 456.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,072.91 : 1,608.12 = 456.47 : x
2. Step 2: Convert to fraction form
   1,072.91/1,608.12 = 456.47/x
3. Step 3: Cross multiply
   1,072.91x = 1,608.12 × 456.47
4. Step 4: Simplify right side
   1,072.91x = 734,056.53
5. Step 5: Solve for x
   x = 734,056.53/1,072.91
6. Step 6: Final answer
   x = 684.17