Finding the Fourth Proportional to 23,915.75, 33,002.78 and 13,305.15

Step by Step Solution

1. Step 1: Write the proportion equation
   23,915.75 : 33,002.78 = 13,305.15 : x
2. Step 2: Convert to fraction form
   23,915.75/33,002.78 = 13,305.15/x
3. Step 3: Cross multiply
   23,915.75x = 33,002.78 × 13,305.15
4. Step 4: Simplify right side
   23,915.75x = 439,106,871.79
5. Step 5: Solve for x
   x = 439,106,871.79/23,915.75
6. Step 6: Final answer
   x = 18,360.58