Finding the Fourth Proportional to 12,427.32, 17,147.79 and 7,389.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,427.32 : 17,147.79 = 7,389.81 : x
2. Step 2: Convert to fraction form
   12,427.32/17,147.79 = 7,389.81/x
3. Step 3: Cross multiply
   12,427.32x = 17,147.79 × 7,389.81
4. Step 4: Simplify right side
   12,427.32x = 126,718,910.02
5. Step 5: Solve for x
   x = 126,718,910.02/12,427.32
6. Step 6: Final answer
   x = 10,196.80