Finding the Fourth Proportional to 23,136.72, 31,928.52 and 13,065

Step by Step Solution

1. Step 1: Write the proportion equation
   23,136.72 : 31,928.52 = 13,065 : x
2. Step 2: Convert to fraction form
   23,136.72/31,928.52 = 13,065/x
3. Step 3: Cross multiply
   23,136.72x = 31,928.52 × 13,065
4. Step 4: Simplify right side
   23,136.72x = 417,146,113.80
5. Step 5: Solve for x
   x = 417,146,113.80/23,136.72
6. Step 6: Final answer
   x = 18,029.61