Finding the Fourth Proportional to 3,636.72, 5,018.70 and 1,980.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,636.72 : 5,018.70 = 1,980.72 : x
2. Step 2: Convert to fraction form
   3,636.72/5,018.70 = 1,980.72/x
3. Step 3: Cross multiply
   3,636.72x = 5,018.70 × 1,980.72
4. Step 4: Simplify right side
   3,636.72x = 9,940,639.46
5. Step 5: Solve for x
   x = 9,940,639.46/3,636.72
6. Step 6: Final answer
   x = 2,733.41