Finding the Fourth Proportional to 20,554.84, 30,762.55 and 13,054.80

Step by Step Solution

1. Step 1: Write the proportion equation
   20,554.84 : 30,762.55 = 13,054.80 : x
2. Step 2: Convert to fraction form
   20,554.84/30,762.55 = 13,054.80/x
3. Step 3: Cross multiply
   20,554.84x = 30,762.55 × 13,054.80
4. Step 4: Simplify right side
   20,554.84x = 401,598,754.78
5. Step 5: Solve for x
   x = 401,598,754.78/20,554.84
6. Step 6: Final answer
   x = 19,537.92