Finding the Fourth Proportional to 12,764.16, 17,499.60 and 12,530.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,764.16 : 17,499.60 = 12,530.88 : x
2. Step 2: Convert to fraction form
   12,764.16/17,499.60 = 12,530.88/x
3. Step 3: Cross multiply
   12,764.16x = 17,499.60 × 12,530.88
4. Step 4: Simplify right side
   12,764.16x = 219,285,387.65
5. Step 5: Solve for x
   x = 219,285,387.65/12,764.16
6. Step 6: Final answer
   x = 17,179.77