Finding the Fourth Proportional to 20,751.02, 31,131.15 and 5,958.78

Step by Step Solution

1. Step 1: Write the proportion equation
   20,751.02 : 31,131.15 = 5,958.78 : x
2. Step 2: Convert to fraction form
   20,751.02/31,131.15 = 5,958.78/x
3. Step 3: Cross multiply
   20,751.02x = 31,131.15 × 5,958.78
4. Step 4: Simplify right side
   20,751.02x = 185,503,674.00
5. Step 5: Solve for x
   x = 185,503,674.00/20,751.02
6. Step 6: Final answer
   x = 8,939.50