Finding the Fourth Proportional to 20,124.72, 27,777.60 and 13,050.72

Step by Step Solution

1. Step 1: Write the proportion equation
   20,124.72 : 27,777.60 = 13,050.72 : x
2. Step 2: Convert to fraction form
   20,124.72/27,777.60 = 13,050.72/x
3. Step 3: Cross multiply
   20,124.72x = 27,777.60 × 13,050.72
4. Step 4: Simplify right side
   20,124.72x = 362,517,679.87
5. Step 5: Solve for x
   x = 362,517,679.87/20,124.72
6. Step 6: Final answer
   x = 18,013.55