Finding the Fourth Proportional to 11,915.88, 16,443.90 and 7,199.28

Step by Step Solution

1. Step 1: Write the proportion equation
   11,915.88 : 16,443.90 = 7,199.28 : x
2. Step 2: Convert to fraction form
   11,915.88/16,443.90 = 7,199.28/x
3. Step 3: Cross multiply
   11,915.88x = 16,443.90 × 7,199.28
4. Step 4: Simplify right side
   11,915.88x = 118,384,240.39
5. Step 5: Solve for x
   x = 118,384,240.39/11,915.88
6. Step 6: Final answer
   x = 9,935.00