Finding the Fourth Proportional to 1,185.25, 1,636.05 and 719.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.25 : 1,636.05 = 719.50 : x
2. Step 2: Convert to fraction form
   1,185.25/1,636.05 = 719.50/x
3. Step 3: Cross multiply
   1,185.25x = 1,636.05 × 719.50
4. Step 4: Simplify right side
   1,185.25x = 1,177,137.98
5. Step 5: Solve for x
   x = 1,177,137.98/1,185.25
6. Step 6: Final answer
   x = 993.16