Finding the Fourth Proportional to 20,498.89, 28,083.57 and 19,730.99

Step by Step Solution

1. Step 1: Write the proportion equation
   20,498.89 : 28,083.57 = 19,730.99 : x
2. Step 2: Convert to fraction form
   20,498.89/28,083.57 = 19,730.99/x
3. Step 3: Cross multiply
   20,498.89x = 28,083.57 × 19,730.99
4. Step 4: Simplify right side
   20,498.89x = 554,116,638.83
5. Step 5: Solve for x
   x = 554,116,638.83/20,498.89
6. Step 6: Final answer
   x = 27,031.54