Finding the Fourth Proportional to 7,139.25, 9,852.18 and 3,996.18

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.25 : 9,852.18 = 3,996.18 : x
2. Step 2: Convert to fraction form
   7,139.25/9,852.18 = 3,996.18/x
3. Step 3: Cross multiply
   7,139.25x = 9,852.18 × 3,996.18
4. Step 4: Simplify right side
   7,139.25x = 39,371,084.67
5. Step 5: Solve for x
   x = 39,371,084.67/7,139.25
6. Step 6: Final answer
   x = 5,514.74