Finding the Fourth Proportional to 865.97, 1,300.10 and 404.07

Step by Step Solution

1. Step 1: Write the proportion equation
   865.97 : 1,300.10 = 404.07 : x
2. Step 2: Convert to fraction form
   865.97/1,300.10 = 404.07/x
3. Step 3: Cross multiply
   865.97x = 1,300.10 × 404.07
4. Step 4: Simplify right side
   865.97x = 525,322.89
5. Step 5: Solve for x
   x = 525,322.89/865.97
6. Step 6: Final answer
   x = 606.63