Finding the Fourth Proportional to 9,064.20, 12,508.72 and 5,085.08

Step by Step Solution

1. Step 1: Write the proportion equation
   9,064.20 : 12,508.72 = 5,085.08 : x
2. Step 2: Convert to fraction form
   9,064.20/12,508.72 = 5,085.08/x
3. Step 3: Cross multiply
   9,064.20x = 12,508.72 × 5,085.08
4. Step 4: Simplify right side
   9,064.20x = 63,607,766.64
5. Step 5: Solve for x
   x = 63,607,766.64/9,064.20
6. Step 6: Final answer
   x = 7,017.47