Finding the Fourth Proportional to 2,641.86, 3,955.50 and 2,116.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.86 : 3,955.50 = 2,116.98 : x
2. Step 2: Convert to fraction form
   2,641.86/3,955.50 = 2,116.98/x
3. Step 3: Cross multiply
   2,641.86x = 3,955.50 × 2,116.98
4. Step 4: Simplify right side
   2,641.86x = 8,373,714.39
5. Step 5: Solve for x
   x = 8,373,714.39/2,641.86
6. Step 6: Final answer
   x = 3,169.63