Finding the Fourth Proportional to 1,057.42, 1,459.17 and 615.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.42 : 1,459.17 = 615.25 : x
2. Step 2: Convert to fraction form
   1,057.42/1,459.17 = 615.25/x
3. Step 3: Cross multiply
   1,057.42x = 1,459.17 × 615.25
4. Step 4: Simplify right side
   1,057.42x = 897,754.34
5. Step 5: Solve for x
   x = 897,754.34/1,057.42
6. Step 6: Final answer
   x = 849.00