Finding the Fourth Proportional to 1,641.76, 2,458.72 and 946.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,641.76 : 2,458.72 = 946.96 : x
2. Step 2: Convert to fraction form
   1,641.76/2,458.72 = 946.96/x
3. Step 3: Cross multiply
   1,641.76x = 2,458.72 × 946.96
4. Step 4: Simplify right side
   1,641.76x = 2,328,309.49
5. Step 5: Solve for x
   x = 2,328,309.49/1,641.76
6. Step 6: Final answer
   x = 1,418.18