Finding the Fourth Proportional to 12,272.80, 17,761 and 12,272.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,272.80 : 17,761 = 12,272.80 : x
2. Step 2: Convert to fraction form
   12,272.80/17,761 = 12,272.80/x
3. Step 3: Cross multiply
   12,272.80x = 17,761 × 12,272.80
4. Step 4: Simplify right side
   12,272.80x = 217,977,200.80
5. Step 5: Solve for x
   x = 217,977,200.80/12,272.80
6. Step 6: Final answer
   x = 17,761