Finding the Fourth Proportional to 1,152.60, 1,727.52 and 664.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,152.60 : 1,727.52 = 664.62 : x
2. Step 2: Convert to fraction form
   1,152.60/1,727.52 = 664.62/x
3. Step 3: Cross multiply
   1,152.60x = 1,727.52 × 664.62
4. Step 4: Simplify right side
   1,152.60x = 1,148,144.34
5. Step 5: Solve for x
   x = 1,148,144.34/1,152.60
6. Step 6: Final answer
   x = 996.13