Finding the Fourth Proportional to 3,985.28, 5,980.69 and 1,647.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.28 : 5,980.69 = 1,647.39 : x
2. Step 2: Convert to fraction form
   3,985.28/5,980.69 = 1,647.39/x
3. Step 3: Cross multiply
   3,985.28x = 5,980.69 × 1,647.39
4. Step 4: Simplify right side
   3,985.28x = 9,852,510.48
5. Step 5: Solve for x
   x = 9,852,510.48/3,985.28
6. Step 6: Final answer
   x = 2,472.23