Finding the Fourth Proportional to 10,990.76, 16,468.84 and 8,498.03

Step by Step Solution

1. Step 1: Write the proportion equation
   10,990.76 : 16,468.84 = 8,498.03 : x
2. Step 2: Convert to fraction form
   10,990.76/16,468.84 = 8,498.03/x
3. Step 3: Cross multiply
   10,990.76x = 16,468.84 × 8,498.03
4. Step 4: Simplify right side
   10,990.76x = 139,952,741.20
5. Step 5: Solve for x
   x = 139,952,741.20/10,990.76
6. Step 6: Final answer
   x = 12,733.68