Finding the Fourth Proportional to 23,715.20, 32,729.05 and 13,106.89

Step by Step Solution

1. Step 1: Write the proportion equation
   23,715.20 : 32,729.05 = 13,106.89 : x
2. Step 2: Convert to fraction form
   23,715.20/32,729.05 = 13,106.89/x
3. Step 3: Cross multiply
   23,715.20x = 32,729.05 × 13,106.89
4. Step 4: Simplify right side
   23,715.20x = 428,975,894.51
5. Step 5: Solve for x
   x = 428,975,894.51/23,715.20
6. Step 6: Final answer
   x = 18,088.65