Finding the Fourth Proportional to 1,018.09, 1,404.72 and 598.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.09 : 1,404.72 = 598.30 : x
2. Step 2: Convert to fraction form
   1,018.09/1,404.72 = 598.30/x
3. Step 3: Cross multiply
   1,018.09x = 1,404.72 × 598.30
4. Step 4: Simplify right side
   1,018.09x = 840,443.98
5. Step 5: Solve for x
   x = 840,443.98/1,018.09
6. Step 6: Final answer
   x = 825.51