Finding the Fourth Proportional to 8,570.61, 12,820.37 and 8,045.73

Step by Step Solution

1. Step 1: Write the proportion equation
   8,570.61 : 12,820.37 = 8,045.73 : x
2. Step 2: Convert to fraction form
   8,570.61/12,820.37 = 8,045.73/x
3. Step 3: Cross multiply
   8,570.61x = 12,820.37 × 8,045.73
4. Step 4: Simplify right side
   8,570.61x = 103,149,235.52
5. Step 5: Solve for x
   x = 103,149,235.52/8,570.61
6. Step 6: Final answer
   x = 12,035.23