Finding the Fourth Proportional to 23,815.78, 32,865.72 and 13,207

Step by Step Solution

1. Step 1: Write the proportion equation
   23,815.78 : 32,865.72 = 13,207 : x
2. Step 2: Convert to fraction form
   23,815.78/32,865.72 = 13,207/x
3. Step 3: Cross multiply
   23,815.78x = 32,865.72 × 13,207
4. Step 4: Simplify right side
   23,815.78x = 434,057,564.04
5. Step 5: Solve for x
   x = 434,057,564.04/23,815.78
6. Step 6: Final answer
   x = 18,225.63