Finding the Fourth Proportional to 1,185.56, 1,636.10 and 654.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.56 : 1,636.10 = 654.45 : x
2. Step 2: Convert to fraction form
   1,185.56/1,636.10 = 654.45/x
3. Step 3: Cross multiply
   1,185.56x = 1,636.10 × 654.45
4. Step 4: Simplify right side
   1,185.56x = 1,070,752.50
5. Step 5: Solve for x
   x = 1,070,752.50/1,185.56
6. Step 6: Final answer
   x = 903.16