Finding the Fourth Proportional to 16,881.62, 23,288.72 and 10,915.16

Step by Step Solution

1. Step 1: Write the proportion equation
   16,881.62 : 23,288.72 = 10,915.16 : x
2. Step 2: Convert to fraction form
   16,881.62/23,288.72 = 10,915.16/x
3. Step 3: Cross multiply
   16,881.62x = 23,288.72 × 10,915.16
4. Step 4: Simplify right side
   16,881.62x = 254,199,933.98
5. Step 5: Solve for x
   x = 254,199,933.98/16,881.62
6. Step 6: Final answer
   x = 15,057.80