Finding the Fourth Proportional to 7,086.48, 9,780.12 and 3,942.84

Step by Step Solution

1. Step 1: Write the proportion equation
   7,086.48 : 9,780.12 = 3,942.84 : x
2. Step 2: Convert to fraction form
   7,086.48/9,780.12 = 3,942.84/x
3. Step 3: Cross multiply
   7,086.48x = 9,780.12 × 3,942.84
4. Step 4: Simplify right side
   7,086.48x = 38,561,448.34
5. Step 5: Solve for x
   x = 38,561,448.34/7,086.48
6. Step 6: Final answer
   x = 5,441.55