Finding the Fourth Proportional to 10,795.71, 16,168.47 and 10,421.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,795.71 : 16,168.47 = 10,421.57 : x
2. Step 2: Convert to fraction form
   10,795.71/16,168.47 = 10,421.57/x
3. Step 3: Cross multiply
   10,795.71x = 16,168.47 × 10,421.57
4. Step 4: Simplify right side
   10,795.71x = 168,500,761.06
5. Step 5: Solve for x
   x = 168,500,761.06/10,795.71
6. Step 6: Final answer
   x = 15,608.12