Finding the Fourth Proportional to 10,996.80, 16,491.36 and 5,156.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,996.80 : 16,491.36 = 5,156.16 : x
2. Step 2: Convert to fraction form
   10,996.80/16,491.36 = 5,156.16/x
3. Step 3: Cross multiply
   10,996.80x = 16,491.36 × 5,156.16
4. Step 4: Simplify right side
   10,996.80x = 85,032,090.78
5. Step 5: Solve for x
   x = 85,032,090.78/10,996.80
6. Step 6: Final answer
   x = 7,732.44