Finding the Fourth Proportional to 1,057.53, 1,459.12 and 615.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.53 : 1,459.12 = 615.16 : x
2. Step 2: Convert to fraction form
   1,057.53/1,459.12 = 615.16/x
3. Step 3: Cross multiply
   1,057.53x = 1,459.12 × 615.16
4. Step 4: Simplify right side
   1,057.53x = 897,581.89
5. Step 5: Solve for x
   x = 897,581.89/1,057.53
6. Step 6: Final answer
   x = 848.75