Finding the Fourth Proportional to 53,903.06, 80,851.89 and 20,639.06

Step by Step Solution

1. Step 1: Write the proportion equation
   53,903.06 : 80,851.89 = 20,639.06 : x
2. Step 2: Convert to fraction form
   53,903.06/80,851.89 = 20,639.06/x
3. Step 3: Cross multiply
   53,903.06x = 80,851.89 × 20,639.06
4. Step 4: Simplify right side
   53,903.06x = 1,668,707,008.82
5. Step 5: Solve for x
   x = 1,668,707,008.82/53,903.06
6. Step 6: Final answer
   x = 30,957.56