Finding the Fourth Proportional to 20,892.74, 31,338.71 and 5,097.88

Step by Step Solution

1. Step 1: Write the proportion equation
   20,892.74 : 31,338.71 = 5,097.88 : x
2. Step 2: Convert to fraction form
   20,892.74/31,338.71 = 5,097.88/x
3. Step 3: Cross multiply
   20,892.74x = 31,338.71 × 5,097.88
4. Step 4: Simplify right side
   20,892.74x = 159,760,800.75
5. Step 5: Solve for x
   x = 159,760,800.75/20,892.74
6. Step 6: Final answer
   x = 7,646.71