Finding the Fourth Proportional to 20,308.71, 30,474.71 and 10,948.69

Step by Step Solution

1. Step 1: Write the proportion equation
   20,308.71 : 30,474.71 = 10,948.69 : x
2. Step 2: Convert to fraction form
   20,308.71/30,474.71 = 10,948.69/x
3. Step 3: Cross multiply
   20,308.71x = 30,474.71 × 10,948.69
4. Step 4: Simplify right side
   20,308.71x = 333,658,152.63
5. Step 5: Solve for x
   x = 333,658,152.63/20,308.71
6. Step 6: Final answer
   x = 16,429.31