Finding the Fourth Proportional to 10,908.48, 16,364.16 and 3,980.64

Step by Step Solution

1. Step 1: Write the proportion equation
   10,908.48 : 16,364.16 = 3,980.64 : x
2. Step 2: Convert to fraction form
   10,908.48/16,364.16 = 3,980.64/x
3. Step 3: Cross multiply
   10,908.48x = 16,364.16 × 3,980.64
4. Step 4: Simplify right side
   10,908.48x = 65,139,829.86
5. Step 5: Solve for x
   x = 65,139,829.86/10,908.48
6. Step 6: Final answer
   x = 5,971.49