Finding the Fourth Proportional to 1,585.69, 2,376.82 and 661.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,585.69 : 2,376.82 = 661.00 : x
2. Step 2: Convert to fraction form
   1,585.69/2,376.82 = 661.00/x
3. Step 3: Cross multiply
   1,585.69x = 2,376.82 × 661.00
4. Step 4: Simplify right side
   1,585.69x = 1,571,066.14
5. Step 5: Solve for x
   x = 1,571,066.14/1,585.69
6. Step 6: Final answer
   x = 990.78