Finding the Fourth Proportional to 9,980.82, 14,971.99 and 5,821.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,980.82 : 14,971.99 = 5,821.25 : x
2. Step 2: Convert to fraction form
   9,980.82/14,971.99 = 5,821.25/x
3. Step 3: Cross multiply
   9,980.82x = 14,971.99 × 5,821.25
4. Step 4: Simplify right side
   9,980.82x = 87,155,636.48
5. Step 5: Solve for x
   x = 87,155,636.48/9,980.82
6. Step 6: Final answer
   x = 8,732.31