Finding the Fourth Proportional to 12,665.58, 17,478.50 and 7,076.58

Step by Step Solution

1. Step 1: Write the proportion equation
   12,665.58 : 17,478.50 = 7,076.58 : x
2. Step 2: Convert to fraction form
   12,665.58/17,478.50 = 7,076.58/x
3. Step 3: Cross multiply
   12,665.58x = 17,478.50 × 7,076.58
4. Step 4: Simplify right side
   12,665.58x = 123,687,968.15
5. Step 5: Solve for x
   x = 123,687,968.15/12,665.58
6. Step 6: Final answer
   x = 9,765.68