Finding the Fourth Proportional to 42,796.70, 64,073.55 and 40,469.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,796.70 : 64,073.55 = 40,469.30 : x
2. Step 2: Convert to fraction form
   42,796.70/64,073.55 = 40,469.30/x
3. Step 3: Cross multiply
   42,796.70x = 64,073.55 × 40,469.30
4. Step 4: Simplify right side
   42,796.70x = 2,593,011,717.02
5. Step 5: Solve for x
   x = 2,593,011,717.02/42,796.70
6. Step 6: Final answer
   x = 60,589.06