Finding the Fourth Proportional to 65,821.42, 90,796.62 and 40,340.12

Step by Step Solution

1. Step 1: Write the proportion equation
   65,821.42 : 90,796.62 = 40,340.12 : x
2. Step 2: Convert to fraction form
   65,821.42/90,796.62 = 40,340.12/x
3. Step 3: Cross multiply
   65,821.42x = 90,796.62 × 40,340.12
4. Step 4: Simplify right side
   65,821.42x = 3,662,746,546.39
5. Step 5: Solve for x
   x = 3,662,746,546.39/65,821.42
6. Step 6: Final answer
   x = 55,646.73