Finding the Fourth Proportional to 866.76, 1,300.59 and 404.41

Step by Step Solution

1. Step 1: Write the proportion equation
   866.76 : 1,300.59 = 404.41 : x
2. Step 2: Convert to fraction form
   866.76/1,300.59 = 404.41/x
3. Step 3: Cross multiply
   866.76x = 1,300.59 × 404.41
4. Step 4: Simplify right side
   866.76x = 525,965.10
5. Step 5: Solve for x
   x = 525,965.10/866.76
6. Step 6: Final answer
   x = 606.82