Finding the Fourth Proportional to 1,185.06, 1,776.30 and 636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.06 : 1,776.30 = 636.72 : x
2. Step 2: Convert to fraction form
   1,185.06/1,776.30 = 636.72/x
3. Step 3: Cross multiply
   1,185.06x = 1,776.30 × 636.72
4. Step 4: Simplify right side
   1,185.06x = 1,131,005.74
5. Step 5: Solve for x
   x = 1,131,005.74/1,185.06
6. Step 6: Final answer
   x = 954.39