Finding the Fourth Proportional to 20,069.72, 27,700.81 and 13,355.63

Step by Step Solution

1. Step 1: Write the proportion equation
   20,069.72 : 27,700.81 = 13,355.63 : x
2. Step 2: Convert to fraction form
   20,069.72/27,700.81 = 13,355.63/x
3. Step 3: Cross multiply
   20,069.72x = 27,700.81 × 13,355.63
4. Step 4: Simplify right side
   20,069.72x = 369,961,597.17
5. Step 5: Solve for x
   x = 369,961,597.17/20,069.72
6. Step 6: Final answer
   x = 18,433.82