Finding the Fourth Proportional to 1,002.59, 1,383.58 and 554.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.59 : 1,383.58 = 554.43 : x
2. Step 2: Convert to fraction form
   1,002.59/1,383.58 = 554.43/x
3. Step 3: Cross multiply
   1,002.59x = 1,383.58 × 554.43
4. Step 4: Simplify right side
   1,002.59x = 767,098.47
5. Step 5: Solve for x
   x = 767,098.47/1,002.59
6. Step 6: Final answer
   x = 765.12