Finding the Fourth Proportional to 20,969.84, 31,465.69 and 8,499.08

Step by Step Solution

1. Step 1: Write the proportion equation
   20,969.84 : 31,465.69 = 8,499.08 : x
2. Step 2: Convert to fraction form
   20,969.84/31,465.69 = 8,499.08/x
3. Step 3: Cross multiply
   20,969.84x = 31,465.69 × 8,499.08
4. Step 4: Simplify right side
   20,969.84x = 267,429,320.89
5. Step 5: Solve for x
   x = 267,429,320.89/20,969.84
6. Step 6: Final answer
   x = 12,753.05