Finding the Fourth Proportional to 1,185.02, 1,635.36 and 661.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,185.02 : 1,635.36 = 661.10 : x
2. Step 2: Convert to fraction form
   1,185.02/1,635.36 = 661.10/x
3. Step 3: Cross multiply
   1,185.02x = 1,635.36 × 661.10
4. Step 4: Simplify right side
   1,185.02x = 1,081,136.50
5. Step 5: Solve for x
   x = 1,081,136.50/1,185.02
6. Step 6: Final answer
   x = 912.34