Finding the Fourth Proportional to 1,018.34, 1,405.07 and 598.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.34 : 1,405.07 = 598.55 : x
2. Step 2: Convert to fraction form
   1,018.34/1,405.07 = 598.55/x
3. Step 3: Cross multiply
   1,018.34x = 1,405.07 × 598.55
4. Step 4: Simplify right side
   1,018.34x = 841,001.66
5. Step 5: Solve for x
   x = 841,001.66/1,018.34
6. Step 6: Final answer
   x = 825.86