Finding the Fourth Proportional to 1,009.18, 1,513.20 and 598.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,009.18 : 1,513.20 = 598.59 : x
2. Step 2: Convert to fraction form
   1,009.18/1,513.20 = 598.59/x
3. Step 3: Cross multiply
   1,009.18x = 1,513.20 × 598.59
4. Step 4: Simplify right side
   1,009.18x = 905,786.39
5. Step 5: Solve for x
   x = 905,786.39/1,009.18
6. Step 6: Final answer
   x = 897.55