Finding the Fourth Proportional to 875.34, 1,315.89 and 731.34

Step by Step Solution

1. Step 1: Write the proportion equation
   875.34 : 1,315.89 = 731.34 : x
2. Step 2: Convert to fraction form
   875.34/1,315.89 = 731.34/x
3. Step 3: Cross multiply
   875.34x = 1,315.89 × 731.34
4. Step 4: Simplify right side
   875.34x = 962,362.99
5. Step 5: Solve for x
   x = 962,362.99/875.34
6. Step 6: Final answer
   x = 1,099.42