Finding the Fourth Proportional to 10,918.71, 16,356.54 and 10,149.84

Step by Step Solution

1. Step 1: Write the proportion equation
   10,918.71 : 16,356.54 = 10,149.84 : x
2. Step 2: Convert to fraction form
   10,918.71/16,356.54 = 10,149.84/x
3. Step 3: Cross multiply
   10,918.71x = 16,356.54 × 10,149.84
4. Step 4: Simplify right side
   10,918.71x = 166,016,321.06
5. Step 5: Solve for x
   x = 166,016,321.06/10,918.71
6. Step 6: Final answer
   x = 15,204.75