Finding the Fourth Proportional to 105,155.18, 145,116.34 and 57,410.54

Step by Step Solution

1. Step 1: Write the proportion equation
   105,155.18 : 145,116.34 = 57,410.54 : x
2. Step 2: Convert to fraction form
   105,155.18/145,116.34 = 57,410.54/x
3. Step 3: Cross multiply
   105,155.18x = 145,116.34 × 57,410.54
4. Step 4: Simplify right side
   105,155.18x = 8,331,207,442.22
5. Step 5: Solve for x
   x = 8,331,207,442.22/105,155.18
6. Step 6: Final answer
   x = 79,227.74