Finding the Fourth Proportional to 9,109.05, 12,570.53 and 5,130.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.05 : 12,570.53 = 5,130.23 : x
2. Step 2: Convert to fraction form
   9,109.05/12,570.53 = 5,130.23/x
3. Step 3: Cross multiply
   9,109.05x = 12,570.53 × 5,130.23
4. Step 4: Simplify right side
   9,109.05x = 64,489,710.12
5. Step 5: Solve for x
   x = 64,489,710.12/9,109.05
6. Step 6: Final answer
   x = 7,079.74