Finding the Fourth Proportional to 10,731.90, 16,078.38 and 10,498.62

Step by Step Solution

1. Step 1: Write the proportion equation
   10,731.90 : 16,078.38 = 10,498.62 : x
2. Step 2: Convert to fraction form
   10,731.90/16,078.38 = 10,498.62/x
3. Step 3: Cross multiply
   10,731.90x = 16,078.38 × 10,498.62
4. Step 4: Simplify right side
   10,731.90x = 168,800,801.84
5. Step 5: Solve for x
   x = 168,800,801.84/10,731.90
6. Step 6: Final answer
   x = 15,728.88