Finding the Fourth Proportional to 1,057.25, 1,458.42 and 637.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.25 : 1,458.42 = 637.34 : x
2. Step 2: Convert to fraction form
   1,057.25/1,458.42 = 637.34/x
3. Step 3: Cross multiply
   1,057.25x = 1,458.42 × 637.34
4. Step 4: Simplify right side
   1,057.25x = 929,513.05
5. Step 5: Solve for x
   x = 929,513.05/1,057.25
6. Step 6: Final answer
   x = 879.18