Finding the Fourth Proportional to 11,915.87, 16,436.43 and 7,672.46

Step by Step Solution

1. Step 1: Write the proportion equation
   11,915.87 : 16,436.43 = 7,672.46 : x
2. Step 2: Convert to fraction form
   11,915.87/16,436.43 = 7,672.46/x
3. Step 3: Cross multiply
   11,915.87x = 16,436.43 × 7,672.46
4. Step 4: Simplify right side
   11,915.87x = 126,107,769.54
5. Step 5: Solve for x
   x = 126,107,769.54/11,915.87
6. Step 6: Final answer
   x = 10,583.18