Finding the Fourth Proportional to 1,150.94, 1,722.29 and 661.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,150.94 : 1,722.29 = 661.59 : x
2. Step 2: Convert to fraction form
   1,150.94/1,722.29 = 661.59/x
3. Step 3: Cross multiply
   1,150.94x = 1,722.29 × 661.59
4. Step 4: Simplify right side
   1,150.94x = 1,139,446.53
5. Step 5: Solve for x
   x = 1,139,446.53/1,150.94
6. Step 6: Final answer
   x = 990.01