Finding the Fourth Proportional to 1,003.88, 1,502.63 and 654.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.88 : 1,502.63 = 654.41 : x
2. Step 2: Convert to fraction form
   1,003.88/1,502.63 = 654.41/x
3. Step 3: Cross multiply
   1,003.88x = 1,502.63 × 654.41
4. Step 4: Simplify right side
   1,003.88x = 983,325.31
5. Step 5: Solve for x
   x = 983,325.31/1,003.88
6. Step 6: Final answer
   x = 979.53