Finding the Fourth Proportional to 16,680.69, 23,018.67 and 9,970.02

Step by Step Solution

1. Step 1: Write the proportion equation
   16,680.69 : 23,018.67 = 9,970.02 : x
2. Step 2: Convert to fraction form
   16,680.69/23,018.67 = 9,970.02/x
3. Step 3: Cross multiply
   16,680.69x = 23,018.67 × 9,970.02
4. Step 4: Simplify right side
   16,680.69x = 229,496,485.18
5. Step 5: Solve for x
   x = 229,496,485.18/16,680.69
6. Step 6: Final answer
   x = 13,758.22