Finding the Fourth Proportional to 16,899.10, 23,693.30 and 16,899.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,899.10 : 23,693.30 = 16,899.10 : x
2. Step 2: Convert to fraction form
   16,899.10/23,693.30 = 16,899.10/x
3. Step 3: Cross multiply
   16,899.10x = 23,693.30 × 16,899.10
4. Step 4: Simplify right side
   16,899.10x = 400,395,446.03
5. Step 5: Solve for x
   x = 400,395,446.03/16,899.10
6. Step 6: Final answer
   x = 23,693.30