Finding the Fourth Proportional to 10,918.69, 15,168.84 and 10,816.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,918.69 : 15,168.84 = 10,816.02 : x
2. Step 2: Convert to fraction form
   10,918.69/15,168.84 = 10,816.02/x
3. Step 3: Cross multiply
   10,918.69x = 15,168.84 × 10,816.02
4. Step 4: Simplify right side
   10,918.69x = 164,066,476.82
5. Step 5: Solve for x
   x = 164,066,476.82/10,918.69
6. Step 6: Final answer
   x = 15,026.21