Finding the Fourth Proportional to 1,057.49, 1,459.23 and 615.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.49 : 1,459.23 = 615.42 : x
2. Step 2: Convert to fraction form
   1,057.49/1,459.23 = 615.42/x
3. Step 3: Cross multiply
   1,057.49x = 1,459.23 × 615.42
4. Step 4: Simplify right side
   1,057.49x = 898,039.33
5. Step 5: Solve for x
   x = 898,039.33/1,057.49
6. Step 6: Final answer
   x = 849.22