Finding the Fourth Proportional to 12,649.76, 17,456.72 and 7,347.68

Step by Step Solution

1. Step 1: Write the proportion equation
   12,649.76 : 17,456.72 = 7,347.68 : x
2. Step 2: Convert to fraction form
   12,649.76/17,456.72 = 7,347.68/x
3. Step 3: Cross multiply
   12,649.76x = 17,456.72 × 7,347.68
4. Step 4: Simplify right side
   12,649.76x = 128,266,392.41
5. Step 5: Solve for x
   x = 128,266,392.41/12,649.76
6. Step 6: Final answer
   x = 10,139.83