Finding the Fourth Proportional to 12,899.29, 17,801.23 and 7,235.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,899.29 : 17,801.23 = 7,235.30 : x
2. Step 2: Convert to fraction form
   12,899.29/17,801.23 = 7,235.30/x
3. Step 3: Cross multiply
   12,899.29x = 17,801.23 × 7,235.30
4. Step 4: Simplify right side
   12,899.29x = 128,797,239.42
5. Step 5: Solve for x
   x = 128,797,239.42/12,899.29
6. Step 6: Final answer
   x = 9,984.83