Finding the Fourth Proportional to 105,483.91, 145,567.98 and 57,740.29

Step by Step Solution

1. Step 1: Write the proportion equation
   105,483.91 : 145,567.98 = 57,740.29 : x
2. Step 2: Convert to fraction form
   105,483.91/145,567.98 = 57,740.29/x
3. Step 3: Cross multiply
   105,483.91x = 145,567.98 × 57,740.29
4. Step 4: Simplify right side
   105,483.91x = 8,405,137,379.91
5. Step 5: Solve for x
   x = 8,405,137,379.91/105,483.91
6. Step 6: Final answer
   x = 79,681.70