Finding the Fourth Proportional to 10,788.29, 16,172.71 and 4,212.86

Step by Step Solution

1. Step 1: Write the proportion equation
   10,788.29 : 16,172.71 = 4,212.86 : x
2. Step 2: Convert to fraction form
   10,788.29/16,172.71 = 4,212.86/x
3. Step 3: Cross multiply
   10,788.29x = 16,172.71 × 4,212.86
4. Step 4: Simplify right side
   10,788.29x = 68,133,386.32
5. Step 5: Solve for x
   x = 68,133,386.32/10,788.29
6. Step 6: Final answer
   x = 6,315.50