Finding the Fourth Proportional to 12,777.42, 17,620.56 and 8,302.44

Step by Step Solution

1. Step 1: Write the proportion equation
   12,777.42 : 17,620.56 = 8,302.44 : x
2. Step 2: Convert to fraction form
   12,777.42/17,620.56 = 8,302.44/x
3. Step 3: Cross multiply
   12,777.42x = 17,620.56 × 8,302.44
4. Step 4: Simplify right side
   12,777.42x = 146,293,642.17
5. Step 5: Solve for x
   x = 146,293,642.17/12,777.42
6. Step 6: Final answer
   x = 11,449.39