Finding the Fourth Proportional to 65,993.76, 91,031.06 and 39,118.28

Step by Step Solution

1. Step 1: Write the proportion equation
   65,993.76 : 91,031.06 = 39,118.28 : x
2. Step 2: Convert to fraction form
   65,993.76/91,031.06 = 39,118.28/x
3. Step 3: Cross multiply
   65,993.76x = 91,031.06 × 39,118.28
4. Step 4: Simplify right side
   65,993.76x = 3,560,978,136.42
5. Step 5: Solve for x
   x = 3,560,978,136.42/65,993.76
6. Step 6: Final answer
   x = 53,959.32