Finding the Fourth Proportional to 12,308.77, 18,479.56 and 10,471.69

Step by Step Solution

1. Step 1: Write the proportion equation
   12,308.77 : 18,479.56 = 10,471.69 : x
2. Step 2: Convert to fraction form
   12,308.77/18,479.56 = 10,471.69/x
3. Step 3: Cross multiply
   12,308.77x = 18,479.56 × 10,471.69
4. Step 4: Simplify right side
   12,308.77x = 193,512,223.66
5. Step 5: Solve for x
   x = 193,512,223.66/12,308.77
6. Step 6: Final answer
   x = 15,721.49