Finding the Fourth Proportional to 20,776.03, 31,169.40 and 5,986.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,776.03 : 31,169.40 = 5,986.10 : x
2. Step 2: Convert to fraction form
   20,776.03/31,169.40 = 5,986.10/x
3. Step 3: Cross multiply
   20,776.03x = 31,169.40 × 5,986.10
4. Step 4: Simplify right side
   20,776.03x = 186,583,200.82
5. Step 5: Solve for x
   x = 186,583,200.82/20,776.03
6. Step 6: Final answer
   x = 8,980.70