Finding the Fourth Proportional to 9,064.30, 12,508.73 and 5,290.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,064.30 : 12,508.73 = 5,290.06 : x
2. Step 2: Convert to fraction form
   9,064.30/12,508.73 = 5,290.06/x
3. Step 3: Cross multiply
   9,064.30x = 12,508.73 × 5,290.06
4. Step 4: Simplify right side
   9,064.30x = 66,171,843.23
5. Step 5: Solve for x
   x = 66,171,843.23/9,064.30
6. Step 6: Final answer
   x = 7,300.27