Finding the Fourth Proportional to 1,018.47, 1,405.28 and 598.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018.47 : 1,405.28 = 598.86 : x
2. Step 2: Convert to fraction form
   1,018.47/1,405.28 = 598.86/x
3. Step 3: Cross multiply
   1,018.47x = 1,405.28 × 598.86
4. Step 4: Simplify right side
   1,018.47x = 841,567.48
5. Step 5: Solve for x
   x = 841,567.48/1,018.47
6. Step 6: Final answer
   x = 826.30