Finding the Fourth Proportional to 16,904.69, 23,320.61 and 10,938.28

Step by Step Solution

1. Step 1: Write the proportion equation
   16,904.69 : 23,320.61 = 10,938.28 : x
2. Step 2: Convert to fraction form
   16,904.69/23,320.61 = 10,938.28/x
3. Step 3: Cross multiply
   16,904.69x = 23,320.61 × 10,938.28
4. Step 4: Simplify right side
   16,904.69x = 255,087,307.26
5. Step 5: Solve for x
   x = 255,087,307.26/16,904.69
6. Step 6: Final answer
   x = 15,089.74