Finding the Fourth Proportional to 105,481.98, 145,566.51 and 57,734.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105,481.98 : 145,566.51 = 57,734.31 : x
2. Step 2: Convert to fraction form
   105,481.98/145,566.51 = 57,734.31/x
3. Step 3: Cross multiply
   105,481.98x = 145,566.51 × 57,734.31
4. Step 4: Simplify right side
   105,481.98x = 8,404,182,013.96
5. Step 5: Solve for x
   x = 8,404,182,013.96/105,481.98
6. Step 6: Final answer
   x = 79,674.10