Finding the Fourth Proportional to 12,620.26, 17,289.83 and 12,147.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,620.26 : 17,289.83 = 12,147.32 : x
2. Step 2: Convert to fraction form
   12,620.26/17,289.83 = 12,147.32/x
3. Step 3: Cross multiply
   12,620.26x = 17,289.83 × 12,147.32
4. Step 4: Simplify right side
   12,620.26x = 210,025,097.76
5. Step 5: Solve for x
   x = 210,025,097.76/12,620.26
6. Step 6: Final answer
   x = 16,641.90