Finding the Fourth Proportional to 12,074.72, 16,661.31 and 6,900.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,074.72 : 16,661.31 = 6,900.21 : x
2. Step 2: Convert to fraction form
   12,074.72/16,661.31 = 6,900.21/x
3. Step 3: Cross multiply
   12,074.72x = 16,661.31 × 6,900.21
4. Step 4: Simplify right side
   12,074.72x = 114,966,454.57
5. Step 5: Solve for x
   x = 114,966,454.57/12,074.72
6. Step 6: Final answer
   x = 9,521.25