Finding the Fourth Proportional to 1,184.28, 1,776.41 and 636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,184.28 : 1,776.41 = 636.72 : x
2. Step 2: Convert to fraction form
   1,184.28/1,776.41 = 636.72/x
3. Step 3: Cross multiply
   1,184.28x = 1,776.41 × 636.72
4. Step 4: Simplify right side
   1,184.28x = 1,131,075.78
5. Step 5: Solve for x
   x = 1,131,075.78/1,184.28
6. Step 6: Final answer
   x = 955.07