Finding the Fourth Proportional to 42,995.54, 64,494.97 and 20,494.62

Step by Step Solution

1. Step 1: Write the proportion equation
   42,995.54 : 64,494.97 = 20,494.62 : x
2. Step 2: Convert to fraction form
   42,995.54/64,494.97 = 20,494.62/x
3. Step 3: Cross multiply
   42,995.54x = 64,494.97 × 20,494.62
4. Step 4: Simplify right side
   42,995.54x = 1,321,799,850.82
5. Step 5: Solve for x
   x = 1,321,799,850.82/42,995.54
6. Step 6: Final answer
   x = 30,742.72