Finding the Fourth Proportional to 1,057.35, 1,459.16 and 615.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.35 : 1,459.16 = 615.27 : x
2. Step 2: Convert to fraction form
   1,057.35/1,459.16 = 615.27/x
3. Step 3: Cross multiply
   1,057.35x = 1,459.16 × 615.27
4. Step 4: Simplify right side
   1,057.35x = 897,777.37
5. Step 5: Solve for x
   x = 897,777.37/1,057.35
6. Step 6: Final answer
   x = 849.08