Finding the Fourth Proportional to 12,188.94, 16,820.59 and 7,152.26

Step by Step Solution

1. Step 1: Write the proportion equation
   12,188.94 : 16,820.59 = 7,152.26 : x
2. Step 2: Convert to fraction form
   12,188.94/16,820.59 = 7,152.26/x
3. Step 3: Cross multiply
   12,188.94x = 16,820.59 × 7,152.26
4. Step 4: Simplify right side
   12,188.94x = 120,305,234.65
5. Step 5: Solve for x
   x = 120,305,234.65/12,188.94
6. Step 6: Final answer
   x = 9,870.04