Finding the Fourth Proportional to 1,185.72, 1,636.62 and 1,072.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.72 : 1,636.62 = 1,072.99 : x
2. Step 2: Convert to fraction form
   1,185.72/1,636.62 = 1,072.99/x
3. Step 3: Cross multiply
   1,185.72x = 1,636.62 × 1,072.99
4. Step 4: Simplify right side
   1,185.72x = 1,756,076.89
5. Step 5: Solve for x
   x = 1,756,076.89/1,185.72
6. Step 6: Final answer
   x = 1,481.02