Finding the Fourth Proportional to 6,987.98, 10,478.60 and 3,287.08

Step by Step Solution

1. Step 1: Write the proportion equation
   6,987.98 : 10,478.60 = 3,287.08 : x
2. Step 2: Convert to fraction form
   6,987.98/10,478.60 = 3,287.08/x
3. Step 3: Cross multiply
   6,987.98x = 10,478.60 × 3,287.08
4. Step 4: Simplify right side
   6,987.98x = 34,443,996.49
5. Step 5: Solve for x
   x = 34,443,996.49/6,987.98
6. Step 6: Final answer
   x = 4,929.03