Finding the Fourth Proportional to 16,087.40, 21,795.75 and 16,087.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,087.40 : 21,795.75 = 16,087.40 : x
2. Step 2: Convert to fraction form
   16,087.40/21,795.75 = 16,087.40/x
3. Step 3: Cross multiply
   16,087.40x = 21,795.75 × 16,087.40
4. Step 4: Simplify right side
   16,087.40x = 350,636,948.55
5. Step 5: Solve for x
   x = 350,636,948.55/16,087.40
6. Step 6: Final answer
   x = 21,795.75