Finding the Fourth Proportional to 9,109.22, 12,570.09 and 5,382.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,109.22 : 12,570.09 = 5,382.50 : x
2. Step 2: Convert to fraction form
   9,109.22/12,570.09 = 5,382.50/x
3. Step 3: Cross multiply
   9,109.22x = 12,570.09 × 5,382.50
4. Step 4: Simplify right side
   9,109.22x = 67,658,509.43
5. Step 5: Solve for x
   x = 67,658,509.43/9,109.22
6. Step 6: Final answer
   x = 7,427.48