Finding the Fourth Proportional to 105,320.05, 145,341.71 and 57,573.38

Step by Step Solution

1. Step 1: Write the proportion equation
   105,320.05 : 145,341.71 = 57,573.38 : x
2. Step 2: Convert to fraction form
   105,320.05/145,341.71 = 57,573.38/x
3. Step 3: Cross multiply
   105,320.05x = 145,341.71 × 57,573.38
4. Step 4: Simplify right side
   105,320.05x = 8,367,813,499.68
5. Step 5: Solve for x
   x = 8,367,813,499.68/105,320.05
6. Step 6: Final answer
   x = 79,451.29