Finding the Fourth Proportional to 3,636.50, 5,018.37 and 1,980.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,636.50 : 5,018.37 = 1,980.50 : x
2. Step 2: Convert to fraction form
   3,636.50/5,018.37 = 1,980.50/x
3. Step 3: Cross multiply
   3,636.50x = 5,018.37 × 1,980.50
4. Step 4: Simplify right side
   3,636.50x = 9,938,881.79
5. Step 5: Solve for x
   x = 9,938,881.79/3,636.50
6. Step 6: Final answer
   x = 2,733.09