Finding the Fourth Proportional to 1,610.72, 2,423.40 and 961.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,610.72 : 2,423.40 = 961.94 : x
2. Step 2: Convert to fraction form
   1,610.72/2,423.40 = 961.94/x
3. Step 3: Cross multiply
   1,610.72x = 2,423.40 × 961.94
4. Step 4: Simplify right side
   1,610.72x = 2,331,165.40
5. Step 5: Solve for x
   x = 2,331,165.40/1,610.72
6. Step 6: Final answer
   x = 1,447.28