Finding the Fourth Proportional to 1,057.51, 1,459.42 and 615.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.51 : 1,459.42 = 615.32 : x
2. Step 2: Convert to fraction form
   1,057.51/1,459.42 = 615.32/x
3. Step 3: Cross multiply
   1,057.51x = 1,459.42 × 615.32
4. Step 4: Simplify right side
   1,057.51x = 898,010.31
5. Step 5: Solve for x
   x = 898,010.31/1,057.51
6. Step 6: Final answer
   x = 849.17