Finding the Fourth Proportional to 2,641.83, 3,985.98 and 2,619.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.83 : 3,985.98 = 2,619.96 : x
2. Step 2: Convert to fraction form
   2,641.83/3,985.98 = 2,619.96/x
3. Step 3: Cross multiply
   2,641.83x = 3,985.98 × 2,619.96
4. Step 4: Simplify right side
   2,641.83x = 10,443,108.16
5. Step 5: Solve for x
   x = 10,443,108.16/2,641.83
6. Step 6: Final answer
   x = 3,952.98