Finding the Fourth Proportional to 12,711.71, 19,062.88 and 4,389.59

Step by Step Solution

1. Step 1: Write the proportion equation
   12,711.71 : 19,062.88 = 4,389.59 : x
2. Step 2: Convert to fraction form
   12,711.71/19,062.88 = 4,389.59/x
3. Step 3: Cross multiply
   12,711.71x = 19,062.88 × 4,389.59
4. Step 4: Simplify right side
   12,711.71x = 83,678,227.42
5. Step 5: Solve for x
   x = 83,678,227.42/12,711.71
6. Step 6: Final answer
   x = 6,582.77