Finding the Fourth Proportional to 42,946.80, 64,439.34 and 16,653.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,946.80 : 64,439.34 = 16,653.57 : x
2. Step 2: Convert to fraction form
   42,946.80/64,439.34 = 16,653.57/x
3. Step 3: Cross multiply
   42,946.80x = 64,439.34 × 16,653.57
4. Step 4: Simplify right side
   42,946.80x = 1,073,145,059.44
5. Step 5: Solve for x
   x = 1,073,145,059.44/42,946.80
6. Step 6: Final answer
   x = 24,987.78