Finding the Fourth Proportional to 42,632.53, 63,929.35 and 20,456.35

Step by Step Solution

1. Step 1: Write the proportion equation
   42,632.53 : 63,929.35 = 20,456.35 : x
2. Step 2: Convert to fraction form
   42,632.53/63,929.35 = 20,456.35/x
3. Step 3: Cross multiply
   42,632.53x = 63,929.35 × 20,456.35
4. Step 4: Simplify right side
   42,632.53x = 1,307,761,158.87
5. Step 5: Solve for x
   x = 1,307,761,158.87/42,632.53
6. Step 6: Final answer
   x = 30,675.19