Finding the Fourth Proportional to 105,578.43, 145,698.27 and 57,832.56

Step by Step Solution

1. Step 1: Write the proportion equation
   105,578.43 : 145,698.27 = 57,832.56 : x
2. Step 2: Convert to fraction form
   105,578.43/145,698.27 = 57,832.56/x
3. Step 3: Cross multiply
   105,578.43x = 145,698.27 × 57,832.56
4. Step 4: Simplify right side
   105,578.43x = 8,426,103,941.67
5. Step 5: Solve for x
   x = 8,426,103,941.67/105,578.43
6. Step 6: Final answer
   x = 79,808.95