Finding the Fourth Proportional to 20,970.59, 31,466.81 and 8,499.83

Step by Step Solution

1. Step 1: Write the proportion equation
   20,970.59 : 31,466.81 = 8,499.83 : x
2. Step 2: Convert to fraction form
   20,970.59/31,466.81 = 8,499.83/x
3. Step 3: Cross multiply
   20,970.59x = 31,466.81 × 8,499.83
4. Step 4: Simplify right side
   20,970.59x = 267,462,399.56
5. Step 5: Solve for x
   x = 267,462,399.56/20,970.59
6. Step 6: Final answer
   x = 12,754.17