Finding the Fourth Proportional to 1,104.32, 1,657.50 and 642.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.32 : 1,657.50 = 642.62 : x
2. Step 2: Convert to fraction form
   1,104.32/1,657.50 = 642.62/x
3. Step 3: Cross multiply
   1,104.32x = 1,657.50 × 642.62
4. Step 4: Simplify right side
   1,104.32x = 1,065,142.65
5. Step 5: Solve for x
   x = 1,065,142.65/1,104.32
6. Step 6: Final answer
   x = 964.52