Finding the Fourth Proportional to 10,217.49, 15,328.05 and 3,980.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,217.49 : 15,328.05 = 3,980.89 : x
2. Step 2: Convert to fraction form
   10,217.49/15,328.05 = 3,980.89/x
3. Step 3: Cross multiply
   10,217.49x = 15,328.05 × 3,980.89
4. Step 4: Simplify right side
   10,217.49x = 61,019,280.96
5. Step 5: Solve for x
   x = 61,019,280.96/10,217.49
6. Step 6: Final answer
   x = 5,972.05