Finding the Fourth Proportional to 1,004.82, 1,385.54 and 631.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.82 : 1,385.54 = 631.35 : x
2. Step 2: Convert to fraction form
   1,004.82/1,385.54 = 631.35/x
3. Step 3: Cross multiply
   1,004.82x = 1,385.54 × 631.35
4. Step 4: Simplify right side
   1,004.82x = 874,757.52
5. Step 5: Solve for x
   x = 874,757.52/1,004.82
6. Step 6: Final answer
   x = 870.56