Finding the Fourth Proportional to 1,018.43, 1,405.59 and 598.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.43 : 1,405.59 = 598.81 : x
2. Step 2: Convert to fraction form
   1,018.43/1,405.59 = 598.81/x
3. Step 3: Cross multiply
   1,018.43x = 1,405.59 × 598.81
4. Step 4: Simplify right side
   1,018.43x = 841,674.32
5. Step 5: Solve for x
   x = 841,674.32/1,018.43
6. Step 6: Final answer
   x = 826.44