Finding the Fourth Proportional to 20,498.88, 28,083.56 and 19,731

Step by Step Solution

1. Step 1: Write the proportion equation
   20,498.88 : 28,083.56 = 19,731 : x
2. Step 2: Convert to fraction form
   20,498.88/28,083.56 = 19,731/x
3. Step 3: Cross multiply
   20,498.88x = 28,083.56 × 19,731
4. Step 4: Simplify right side
   20,498.88x = 554,116,722.36
5. Step 5: Solve for x
   x = 554,116,722.36/20,498.88
6. Step 6: Final answer
   x = 27,031.56