Finding the Fourth Proportional to 16,680.90, 23,022.72 and 10,720.02

Step by Step Solution

1. Step 1: Write the proportion equation
   16,680.90 : 23,022.72 = 10,720.02 : x
2. Step 2: Convert to fraction form
   16,680.90/23,022.72 = 10,720.02/x
3. Step 3: Cross multiply
   16,680.90x = 23,022.72 × 10,720.02
4. Step 4: Simplify right side
   16,680.90x = 246,804,018.85
5. Step 5: Solve for x
   x = 246,804,018.85/16,680.90
6. Step 6: Final answer
   x = 14,795.61