Finding the Fourth Proportional to 1,315.59, 1,814.73 and 961.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,315.59 : 1,814.73 = 961.08 : x
2. Step 2: Convert to fraction form
   1,315.59/1,814.73 = 961.08/x
3. Step 3: Cross multiply
   1,315.59x = 1,814.73 × 961.08
4. Step 4: Simplify right side
   1,315.59x = 1,744,100.66
5. Step 5: Solve for x
   x = 1,744,100.66/1,315.59
6. Step 6: Final answer
   x = 1,325.72