Finding the Fourth Proportional to 1,061.68, 1,464.48 and 663.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.68 : 1,464.48 = 663.56 : x
2. Step 2: Convert to fraction form
   1,061.68/1,464.48 = 663.56/x
3. Step 3: Cross multiply
   1,061.68x = 1,464.48 × 663.56
4. Step 4: Simplify right side
   1,061.68x = 971,770.35
5. Step 5: Solve for x
   x = 971,770.35/1,061.68
6. Step 6: Final answer
   x = 915.31