Finding the Fourth Proportional to 28,343.88, 42,501.24 and 12,753

Step by Step Solution

1. Step 1: Write the proportion equation
   28,343.88 : 42,501.24 = 12,753 : x
2. Step 2: Convert to fraction form
   28,343.88/42,501.24 = 12,753/x
3. Step 3: Cross multiply
   28,343.88x = 42,501.24 × 12,753
4. Step 4: Simplify right side
   28,343.88x = 542,018,313.72
5. Step 5: Solve for x
   x = 542,018,313.72/28,343.88
6. Step 6: Final answer
   x = 19,122.94