Finding the Fourth Proportional to 456.89, 630.59 and 291.15

Step by Step Solution

1. Step 1: Write the proportion equation
   456.89 : 630.59 = 291.15 : x
2. Step 2: Convert to fraction form
   456.89/630.59 = 291.15/x
3. Step 3: Cross multiply
   456.89x = 630.59 × 291.15
4. Step 4: Simplify right side
   456.89x = 183,594.82
5. Step 5: Solve for x
   x = 183,594.82/456.89
6. Step 6: Final answer
   x = 401.84