Finding the Fourth Proportional to 13,196.98, 19,767.92 and 7,915.24

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.98 : 19,767.92 = 7,915.24 : x
2. Step 2: Convert to fraction form
   13,196.98/19,767.92 = 7,915.24/x
3. Step 3: Cross multiply
   13,196.98x = 19,767.92 × 7,915.24
4. Step 4: Simplify right side
   13,196.98x = 156,467,801.47
5. Step 5: Solve for x
   x = 156,467,801.47/13,196.98
6. Step 6: Final answer
   x = 11,856.34