Finding the Fourth Proportional to 8,570.43, 12,840.98 and 4,677.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,570.43 : 12,840.98 = 4,677.57 : x
2. Step 2: Convert to fraction form
   8,570.43/12,840.98 = 4,677.57/x
3. Step 3: Cross multiply
   8,570.43x = 12,840.98 × 4,677.57
4. Step 4: Simplify right side
   8,570.43x = 60,064,559.43
5. Step 5: Solve for x
   x = 60,064,559.43/8,570.43
6. Step 6: Final answer
   x = 7,008.35