Finding the Fourth Proportional to 1,185.56, 1,776.81 and 637.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.56 : 1,776.81 = 637.12 : x
2. Step 2: Convert to fraction form
   1,185.56/1,776.81 = 637.12/x
3. Step 3: Cross multiply
   1,185.56x = 1,776.81 × 637.12
4. Step 4: Simplify right side
   1,185.56x = 1,132,034.01
5. Step 5: Solve for x
   x = 1,132,034.01/1,185.56
6. Step 6: Final answer
   x = 954.85