Finding the Fourth Proportional to 12,899.76, 17,805.72 and 7,314.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,899.76 : 17,805.72 = 7,314.48 : x
2. Step 2: Convert to fraction form
   12,899.76/17,805.72 = 7,314.48/x
3. Step 3: Cross multiply
   12,899.76x = 17,805.72 × 7,314.48
4. Step 4: Simplify right side
   12,899.76x = 130,239,582.83
5. Step 5: Solve for x
   x = 130,239,582.83/12,899.76
6. Step 6: Final answer
   x = 10,096.28