Finding the Fourth Proportional to 1,063.67, 1,468.59 and 665.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,063.67 : 1,468.59 = 665.50 : x
2. Step 2: Convert to fraction form
   1,063.67/1,468.59 = 665.50/x
3. Step 3: Cross multiply
   1,063.67x = 1,468.59 × 665.50
4. Step 4: Simplify right side
   1,063.67x = 977,346.65
5. Step 5: Solve for x
   x = 977,346.65/1,063.67
6. Step 6: Final answer
   x = 918.84