Finding the Fourth Proportional to 65,665.23, 90,617.94 and 38,817.42

Step by Step Solution

1. Step 1: Write the proportion equation
   65,665.23 : 90,617.94 = 38,817.42 : x
2. Step 2: Convert to fraction form
   65,665.23/90,617.94 = 38,817.42/x
3. Step 3: Cross multiply
   65,665.23x = 90,617.94 × 38,817.42
4. Step 4: Simplify right side
   65,665.23x = 3,517,554,636.51
5. Step 5: Solve for x
   x = 3,517,554,636.51/65,665.23
6. Step 6: Final answer
   x = 53,567.99