Finding the Fourth Proportional to 1,003.08, 1,384.38 and 654.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.08 : 1,384.38 = 654.78 : x
2. Step 2: Convert to fraction form
   1,003.08/1,384.38 = 654.78/x
3. Step 3: Cross multiply
   1,003.08x = 1,384.38 × 654.78
4. Step 4: Simplify right side
   1,003.08x = 906,464.34
5. Step 5: Solve for x
   x = 906,464.34/1,003.08
6. Step 6: Final answer
   x = 903.68