Finding the Fourth Proportional to 9,209.31, 12,708.99 and 5,017.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,209.31 : 12,708.99 = 5,017.56 : x
2. Step 2: Convert to fraction form
   9,209.31/12,708.99 = 5,017.56/x
3. Step 3: Cross multiply
   9,209.31x = 12,708.99 × 5,017.56
4. Step 4: Simplify right side
   9,209.31x = 63,768,119.86
5. Step 5: Solve for x
   x = 63,768,119.86/9,209.31
6. Step 6: Final answer
   x = 6,924.31