Finding the Fourth Proportional to 1,185.15, 1,776.61 and 637.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.15 : 1,776.61 = 637.39 : x
2. Step 2: Convert to fraction form
   1,185.15/1,776.61 = 637.39/x
3. Step 3: Cross multiply
   1,185.15x = 1,776.61 × 637.39
4. Step 4: Simplify right side
   1,185.15x = 1,132,393.45
5. Step 5: Solve for x
   x = 1,132,393.45/1,185.15
6. Step 6: Final answer
   x = 955.49