Finding the Fourth Proportional to 43,145.33, 64,691.56 and 16,819.31

Step by Step Solution

1. Step 1: Write the proportion equation
   43,145.33 : 64,691.56 = 16,819.31 : x
2. Step 2: Convert to fraction form
   43,145.33/64,691.56 = 16,819.31/x
3. Step 3: Cross multiply
   43,145.33x = 64,691.56 × 16,819.31
4. Step 4: Simplify right side
   43,145.33x = 1,088,067,584.78
5. Step 5: Solve for x
   x = 1,088,067,584.78/43,145.33
6. Step 6: Final answer
   x = 25,218.67