Finding the Fourth Proportional to 1,616.10, 2,422.71 and 641.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,616.10 : 2,422.71 = 641.94 : x
2. Step 2: Convert to fraction form
   1,616.10/2,422.71 = 641.94/x
3. Step 3: Cross multiply
   1,616.10x = 2,422.71 × 641.94
4. Step 4: Simplify right side
   1,616.10x = 1,555,234.46
5. Step 5: Solve for x
   x = 1,555,234.46/1,616.10
6. Step 6: Final answer
   x = 962.34