Finding the Fourth Proportional to 830.72, 1,145.94 and 481.34

Step by Step Solution

1. Step 1: Write the proportion equation
   830.72 : 1,145.94 = 481.34 : x
2. Step 2: Convert to fraction form
   830.72/1,145.94 = 481.34/x
3. Step 3: Cross multiply
   830.72x = 1,145.94 × 481.34
4. Step 4: Simplify right side
   830.72x = 551,586.76
5. Step 5: Solve for x
   x = 551,586.76/830.72
6. Step 6: Final answer
   x = 663.99