Finding the Fourth Proportional to 20,499.89, 28,084.94 and 19,731.99

Step by Step Solution

1. Step 1: Write the proportion equation
   20,499.89 : 28,084.94 = 19,731.99 : x
2. Step 2: Convert to fraction form
   20,499.89/28,084.94 = 19,731.99/x
3. Step 3: Cross multiply
   20,499.89x = 28,084.94 × 19,731.99
4. Step 4: Simplify right side
   20,499.89x = 554,171,755.23
5. Step 5: Solve for x
   x = 554,171,755.23/20,499.89
6. Step 6: Final answer
   x = 27,032.91