Finding the Fourth Proportional to 1,185.79, 1,636.49 and 654.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.79 : 1,636.49 = 654.72 : x
2. Step 2: Convert to fraction form
   1,185.79/1,636.49 = 654.72/x
3. Step 3: Cross multiply
   1,185.79x = 1,636.49 × 654.72
4. Step 4: Simplify right side
   1,185.79x = 1,071,442.73
5. Step 5: Solve for x
   x = 1,071,442.73/1,185.79
6. Step 6: Final answer
   x = 903.57