Finding the Fourth Proportional to 9,064.29, 12,508.73 and 5,290.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,064.29 : 12,508.73 = 5,290.05 : x
2. Step 2: Convert to fraction form
   9,064.29/12,508.73 = 5,290.05/x
3. Step 3: Cross multiply
   9,064.29x = 12,508.73 × 5,290.05
4. Step 4: Simplify right side
   9,064.29x = 66,171,807.14
5. Step 5: Solve for x
   x = 66,171,807.14/9,064.29
6. Step 6: Final answer
   x = 7,300.27