Finding the Fourth Proportional to 105,565.33, 145,676.23 and 57,819.07

Step by Step Solution

1. Step 1: Write the proportion equation
   105,565.33 : 145,676.23 = 57,819.07 : x
2. Step 2: Convert to fraction form
   105,565.33/145,676.23 = 57,819.07/x
3. Step 3: Cross multiply
   105,565.33x = 145,676.23 × 57,819.07
4. Step 4: Simplify right side
   105,565.33x = 8,422,864,139.71
5. Step 5: Solve for x
   x = 8,422,864,139.71/105,565.33
6. Step 6: Final answer
   x = 79,788.17