Finding the Fourth Proportional to 16,678.50, 23,019.06 and 9,603.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,678.50 : 23,019.06 = 9,603.72 : x
2. Step 2: Convert to fraction form
   16,678.50/23,019.06 = 9,603.72/x
3. Step 3: Cross multiply
   16,678.50x = 23,019.06 × 9,603.72
4. Step 4: Simplify right side
   16,678.50x = 221,068,606.90
5. Step 5: Solve for x
   x = 221,068,606.90/16,678.50
6. Step 6: Final answer
   x = 13,254.71