Finding the Fourth Proportional to 16,698.30, 23,036.28 and 9,980.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,698.30 : 23,036.28 = 9,980.56 : x
2. Step 2: Convert to fraction form
   16,698.30/23,036.28 = 9,980.56/x
3. Step 3: Cross multiply
   16,698.30x = 23,036.28 × 9,980.56
4. Step 4: Simplify right side
   16,698.30x = 229,914,974.72
5. Step 5: Solve for x
   x = 229,914,974.72/16,698.30
6. Step 6: Final answer
   x = 13,768.77