Finding the Fourth Proportional to 7,091.35, 9,786.06 and 3,948.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,091.35 : 9,786.06 = 3,948.28 : x
2. Step 2: Convert to fraction form
   7,091.35/9,786.06 = 3,948.28/x
3. Step 3: Cross multiply
   7,091.35x = 9,786.06 × 3,948.28
4. Step 4: Simplify right side
   7,091.35x = 38,638,065.71
5. Step 5: Solve for x
   x = 38,638,065.71/7,091.35
6. Step 6: Final answer
   x = 5,448.62