Finding the Fourth Proportional to 8,570.34, 12,829.59 and 7,922.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,570.34 : 12,829.59 = 7,922.34 : x
2. Step 2: Convert to fraction form
   8,570.34/12,829.59 = 7,922.34/x
3. Step 3: Cross multiply
   8,570.34x = 12,829.59 × 7,922.34
4. Step 4: Simplify right side
   8,570.34x = 101,640,374.04
5. Step 5: Solve for x
   x = 101,640,374.04/8,570.34
6. Step 6: Final answer
   x = 11,859.55