Finding the Fourth Proportional to 16,915.59, 23,343.57 and 9,361.80

Step by Step Solution

1. Step 1: Write the proportion equation
   16,915.59 : 23,343.57 = 9,361.80 : x
2. Step 2: Convert to fraction form
   16,915.59/23,343.57 = 9,361.80/x
3. Step 3: Cross multiply
   16,915.59x = 23,343.57 × 9,361.80
4. Step 4: Simplify right side
   16,915.59x = 218,537,833.63
5. Step 5: Solve for x
   x = 218,537,833.63/16,915.59
6. Step 6: Final answer
   x = 12,919.31