Finding the Fourth Proportional to 10,917.69, 15,167.45 and 10,815.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,917.69 : 15,167.45 = 10,815.02 : x
2. Step 2: Convert to fraction form
   10,917.69/15,167.45 = 10,815.02/x
3. Step 3: Cross multiply
   10,917.69x = 15,167.45 × 10,815.02
4. Step 4: Simplify right side
   10,917.69x = 164,036,283.18
5. Step 5: Solve for x
   x = 164,036,283.18/10,917.69
6. Step 6: Final answer
   x = 15,024.82