Finding the Fourth Proportional to 6,962.82, 9,609.21 and 3,978.59

Step by Step Solution

1. Step 1: Write the proportion equation
   6,962.82 : 9,609.21 = 3,978.59 : x
2. Step 2: Convert to fraction form
   6,962.82/9,609.21 = 3,978.59/x
3. Step 3: Cross multiply
   6,962.82x = 9,609.21 × 3,978.59
4. Step 4: Simplify right side
   6,962.82x = 38,231,106.81
5. Step 5: Solve for x
   x = 38,231,106.81/6,962.82
6. Step 6: Final answer
   x = 5,490.75