Finding the Fourth Proportional to 1,185.91, 1,636.50 and 654.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.91 : 1,636.50 = 654.79 : x
2. Step 2: Convert to fraction form
   1,185.91/1,636.50 = 654.79/x
3. Step 3: Cross multiply
   1,185.91x = 1,636.50 × 654.79
4. Step 4: Simplify right side
   1,185.91x = 1,071,563.84
5. Step 5: Solve for x
   x = 1,071,563.84/1,185.91
6. Step 6: Final answer
   x = 903.58