Finding the Fourth Proportional to 42,436.41, 63,668.42 and 20,246.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,436.41 : 63,668.42 = 20,246.91 : x
2. Step 2: Convert to fraction form
   42,436.41/63,668.42 = 20,246.91/x
3. Step 3: Cross multiply
   42,436.41x = 63,668.42 × 20,246.91
4. Step 4: Simplify right side
   42,436.41x = 1,289,088,505.52
5. Step 5: Solve for x
   x = 1,289,088,505.52/42,436.41
6. Step 6: Final answer
   x = 30,376.95