Finding the Fourth Proportional to 21,050.76, 29,050.74 and 12,099.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,050.76 : 29,050.74 = 12,099.72 : x
2. Step 2: Convert to fraction form
   21,050.76/29,050.74 = 12,099.72/x
3. Step 3: Cross multiply
   21,050.76x = 29,050.74 × 12,099.72
4. Step 4: Simplify right side
   21,050.76x = 351,505,819.79
5. Step 5: Solve for x
   x = 351,505,819.79/21,050.76
6. Step 6: Final answer
   x = 16,698.01