Finding the Fourth Proportional to 105,422.73, 145,486.83 and 57,674.98

Step by Step Solution

1. Step 1: Write the proportion equation
   105,422.73 : 145,486.83 = 57,674.98 : x
2. Step 2: Convert to fraction form
   105,422.73/145,486.83 = 57,674.98/x
3. Step 3: Cross multiply
   105,422.73x = 145,486.83 × 57,674.98
4. Step 4: Simplify right side
   105,422.73x = 8,390,950,010.51
5. Step 5: Solve for x
   x = 8,390,950,010.51/105,422.73
6. Step 6: Final answer
   x = 79,593.37