Finding the Fourth Proportional to 23,685.81, 32,685.79 and 13,075.21

Step by Step Solution

1. Step 1: Write the proportion equation
   23,685.81 : 32,685.79 = 13,075.21 : x
2. Step 2: Convert to fraction form
   23,685.81/32,685.79 = 13,075.21/x
3. Step 3: Cross multiply
   23,685.81x = 32,685.79 × 13,075.21
4. Step 4: Simplify right side
   23,685.81x = 427,373,568.27
5. Step 5: Solve for x
   x = 427,373,568.27/23,685.81
6. Step 6: Final answer
   x = 18,043.44