Finding the Fourth Proportional to 42,984.80, 64,162.82 and 39,818.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,984.80 : 64,162.82 = 39,818.78 : x
2. Step 2: Convert to fraction form
   42,984.80/64,162.82 = 39,818.78/x
3. Step 3: Cross multiply
   42,984.80x = 64,162.82 × 39,818.78
4. Step 4: Simplify right side
   42,984.80x = 2,554,885,086.88
5. Step 5: Solve for x
   x = 2,554,885,086.88/42,984.80
6. Step 6: Final answer
   x = 59,436.94