Finding the Fourth Proportional to 9,108.40, 12,570.06 and 5,570.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,108.40 : 12,570.06 = 5,570.50 : x
2. Step 2: Convert to fraction form
   9,108.40/12,570.06 = 5,570.50/x
3. Step 3: Cross multiply
   9,108.40x = 12,570.06 × 5,570.50
4. Step 4: Simplify right side
   9,108.40x = 70,021,519.23
5. Step 5: Solve for x
   x = 70,021,519.23/9,108.40
6. Step 6: Final answer
   x = 7,687.58