Finding the Fourth Proportional to 8,610.30, 12,071.70 and 8,610.30

Step by Step Solution

1. Step 1: Write the proportion equation
   8,610.30 : 12,071.70 = 8,610.30 : x
2. Step 2: Convert to fraction form
   8,610.30/12,071.70 = 8,610.30/x
3. Step 3: Cross multiply
   8,610.30x = 12,071.70 × 8,610.30
4. Step 4: Simplify right side
   8,610.30x = 103,940,958.51
5. Step 5: Solve for x
   x = 103,940,958.51/8,610.30
6. Step 6: Final answer
   x = 12,071.70