Finding the Fourth Proportional to 30,427.98, 45,640.98 and 13,788.06

Step by Step Solution

1. Step 1: Write the proportion equation
   30,427.98 : 45,640.98 = 13,788.06 : x
2. Step 2: Convert to fraction form
   30,427.98/45,640.98 = 13,788.06/x
3. Step 3: Cross multiply
   30,427.98x = 45,640.98 × 13,788.06
4. Step 4: Simplify right side
   30,427.98x = 629,300,570.70
5. Step 5: Solve for x
   x = 629,300,570.70/30,427.98
6. Step 6: Final answer
   x = 20,681.64