Finding the Fourth Proportional to 12,816.54, 17,689.32 and 7,511.94

Step by Step Solution

1. Step 1: Write the proportion equation
   12,816.54 : 17,689.32 = 7,511.94 : x
2. Step 2: Convert to fraction form
   12,816.54/17,689.32 = 7,511.94/x
3. Step 3: Cross multiply
   12,816.54x = 17,689.32 × 7,511.94
4. Step 4: Simplify right side
   12,816.54x = 132,881,110.48
5. Step 5: Solve for x
   x = 132,881,110.48/12,816.54
6. Step 6: Final answer
   x = 10,367.94