Finding the Fourth Proportional to 30,830.29, 46,308.56 and 20,315.39

Step by Step Solution

1. Step 1: Write the proportion equation
   30,830.29 : 46,308.56 = 20,315.39 : x
2. Step 2: Convert to fraction form
   30,830.29/46,308.56 = 20,315.39/x
3. Step 3: Cross multiply
   30,830.29x = 46,308.56 × 20,315.39
4. Step 4: Simplify right side
   30,830.29x = 940,776,123.62
5. Step 5: Solve for x
   x = 940,776,123.62/30,830.29
6. Step 6: Final answer
   x = 30,514.67