Finding the Fourth Proportional to 12,039.81, 16,615.79 and 7,005.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,039.81 : 16,615.79 = 7,005.53 : x
2. Step 2: Convert to fraction form
   12,039.81/16,615.79 = 7,005.53/x
3. Step 3: Cross multiply
   12,039.81x = 16,615.79 × 7,005.53
4. Step 4: Simplify right side
   12,039.81x = 116,402,297.21
5. Step 5: Solve for x
   x = 116,402,297.21/12,039.81
6. Step 6: Final answer
   x = 9,668.12