Finding the Fourth Proportional to 20,786.31, 31,175.70 and 5,991.59

Step by Step Solution

1. Step 1: Write the proportion equation
   20,786.31 : 31,175.70 = 5,991.59 : x
2. Step 2: Convert to fraction form
   20,786.31/31,175.70 = 5,991.59/x
3. Step 3: Cross multiply
   20,786.31x = 31,175.70 × 5,991.59
4. Step 4: Simplify right side
   20,786.31x = 186,791,856.48
5. Step 5: Solve for x
   x = 186,791,856.48/20,786.31
6. Step 6: Final answer
   x = 8,986.29