Finding the Fourth Proportional to 1,004.37, 1,385.58 and 631.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,004.37 : 1,385.58 = 631.08 : x
2. Step 2: Convert to fraction form
   1,004.37/1,385.58 = 631.08/x
3. Step 3: Cross multiply
   1,004.37x = 1,385.58 × 631.08
4. Step 4: Simplify right side
   1,004.37x = 874,411.83
5. Step 5: Solve for x
   x = 874,411.83/1,004.37
6. Step 6: Final answer
   x = 870.61