Finding the Fourth Proportional to 11,018, 16,501.08 and 8,426

Step by Step Solution

1. Step 1: Write the proportion equation
   11,018 : 16,501.08 = 8,426 : x
2. Step 2: Convert to fraction form
   11,018/16,501.08 = 8,426/x
3. Step 3: Cross multiply
   11,018x = 16,501.08 × 8,426
4. Step 4: Simplify right side
   11,018x = 139,038,100.08
5. Step 5: Solve for x
   x = 139,038,100.08/11,018
6. Step 6: Final answer
   x = 12,619.18