Finding the Fourth Proportional to 105,229.86, 145,214.82 and 57,483.42

Step by Step Solution

1. Step 1: Write the proportion equation
   105,229.86 : 145,214.82 = 57,483.42 : x
2. Step 2: Convert to fraction form
   105,229.86/145,214.82 = 57,483.42/x
3. Step 3: Cross multiply
   105,229.86x = 145,214.82 × 57,483.42
4. Step 4: Simplify right side
   105,229.86x = 8,347,444,488.28
5. Step 5: Solve for x
   x = 8,347,444,488.28/105,229.86
6. Step 6: Final answer
   x = 79,325.82