Finding the Fourth Proportional to 105,688.12, 145,842.33 and 62,665.42

Step by Step Solution

1. Step 1: Write the proportion equation
   105,688.12 : 145,842.33 = 62,665.42 : x
2. Step 2: Convert to fraction form
   105,688.12/145,842.33 = 62,665.42/x
3. Step 3: Cross multiply
   105,688.12x = 145,842.33 × 62,665.42
4. Step 4: Simplify right side
   105,688.12x = 9,139,270,863.23
5. Step 5: Solve for x
   x = 9,139,270,863.23/105,688.12
6. Step 6: Final answer
   x = 86,473.97