Finding the Fourth Proportional to 20,679.50, 31,019.34 and 5,097.26

Step by Step Solution

1. Step 1: Write the proportion equation
   20,679.50 : 31,019.34 = 5,097.26 : x
2. Step 2: Convert to fraction form
   20,679.50/31,019.34 = 5,097.26/x
3. Step 3: Cross multiply
   20,679.50x = 31,019.34 × 5,097.26
4. Step 4: Simplify right side
   20,679.50x = 158,113,641.01
5. Step 5: Solve for x
   x = 158,113,641.01/20,679.50
6. Step 6: Final answer
   x = 7,645.91