Finding the Fourth Proportional to 16,856.10, 23,554.80 and 16,856.10

Step by Step Solution

1. Step 1: Write the proportion equation
   16,856.10 : 23,554.80 = 16,856.10 : x
2. Step 2: Convert to fraction form
   16,856.10/23,554.80 = 16,856.10/x
3. Step 3: Cross multiply
   16,856.10x = 23,554.80 × 16,856.10
4. Step 4: Simplify right side
   16,856.10x = 397,042,064.28
5. Step 5: Solve for x
   x = 397,042,064.28/16,856.10
6. Step 6: Final answer
   x = 23,554.80