Finding the Fourth Proportional to 9,109.06, 12,574.01 and 7,120.26

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.06 : 12,574.01 = 7,120.26 : x
2. Step 2: Convert to fraction form
   9,109.06/12,574.01 = 7,120.26/x
3. Step 3: Cross multiply
   9,109.06x = 12,574.01 × 7,120.26
4. Step 4: Simplify right side
   9,109.06x = 89,530,238.24
5. Step 5: Solve for x
   x = 89,530,238.24/9,109.06
6. Step 6: Final answer
   x = 9,828.70