Finding the Fourth Proportional to 10,902.69, 16,356.47 and 3,977.19

Step by Step Solution

1. Step 1: Write the proportion equation
   10,902.69 : 16,356.47 = 3,977.19 : x
2. Step 2: Convert to fraction form
   10,902.69/16,356.47 = 3,977.19/x
3. Step 3: Cross multiply
   10,902.69x = 16,356.47 × 3,977.19
4. Step 4: Simplify right side
   10,902.69x = 65,052,788.92
5. Step 5: Solve for x
   x = 65,052,788.92/10,902.69
6. Step 6: Final answer
   x = 5,966.67