Finding the Fourth Proportional to 1,185.61, 1,636.22 and 654.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.61 : 1,636.22 = 654.49 : x
2. Step 2: Convert to fraction form
   1,185.61/1,636.22 = 654.49/x
3. Step 3: Cross multiply
   1,185.61x = 1,636.22 × 654.49
4. Step 4: Simplify right side
   1,185.61x = 1,070,889.63
5. Step 5: Solve for x
   x = 1,070,889.63/1,185.61
6. Step 6: Final answer
   x = 903.24