Finding the Fourth Proportional to 1,445.81, 1,996.14 and 1,003.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,445.81 : 1,996.14 = 1,003.55 : x
2. Step 2: Convert to fraction form
   1,445.81/1,996.14 = 1,003.55/x
3. Step 3: Cross multiply
   1,445.81x = 1,996.14 × 1,003.55
4. Step 4: Simplify right side
   1,445.81x = 2,003,226.30
5. Step 5: Solve for x
   x = 2,003,226.30/1,445.81
6. Step 6: Final answer
   x = 1,385.54