Finding the Fourth Proportional to 21,157.68, 29,196.27 and 11,725.50

Step by Step Solution

1. Step 1: Write the proportion equation
   21,157.68 : 29,196.27 = 11,725.50 : x
2. Step 2: Convert to fraction form
   21,157.68/29,196.27 = 11,725.50/x
3. Step 3: Cross multiply
   21,157.68x = 29,196.27 × 11,725.50
4. Step 4: Simplify right side
   21,157.68x = 342,340,863.89
5. Step 5: Solve for x
   x = 342,340,863.89/21,157.68
6. Step 6: Final answer
   x = 16,180.45