Finding the Fourth Proportional to 1,003.63, 1,385.52 and 631.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.63 : 1,385.52 = 631.18 : x
2. Step 2: Convert to fraction form
   1,003.63/1,385.52 = 631.18/x
3. Step 3: Cross multiply
   1,003.63x = 1,385.52 × 631.18
4. Step 4: Simplify right side
   1,003.63x = 874,512.51
5. Step 5: Solve for x
   x = 874,512.51/1,003.63
6. Step 6: Final answer
   x = 871.35