Finding the Fourth Proportional to 12,669.19, 17,487.59 and 7,953.47

Step by Step Solution

1. Step 1: Write the proportion equation
   12,669.19 : 17,487.59 = 7,953.47 : x
2. Step 2: Convert to fraction form
   12,669.19/17,487.59 = 7,953.47/x
3. Step 3: Cross multiply
   12,669.19x = 17,487.59 × 7,953.47
4. Step 4: Simplify right side
   12,669.19x = 139,086,960.81
5. Step 5: Solve for x
   x = 139,086,960.81/12,669.19
6. Step 6: Final answer
   x = 10,978.36