Finding the Fourth Proportional to 915.05, 1,262.89 and 522.10

Step by Step Solution

1. Step 1: Write the proportion equation
   915.05 : 1,262.89 = 522.10 : x
2. Step 2: Convert to fraction form
   915.05/1,262.89 = 522.10/x
3. Step 3: Cross multiply
   915.05x = 1,262.89 × 522.10
4. Step 4: Simplify right side
   915.05x = 659,350.00
5. Step 5: Solve for x
   x = 659,350.00/915.05
6. Step 6: Final answer
   x = 720.56