Finding the Fourth Proportional to 6,825.30, 10,234.89 and 3,129.90

Step by Step Solution

1. Step 1: Write the proportion equation
   6,825.30 : 10,234.89 = 3,129.90 : x
2. Step 2: Convert to fraction form
   6,825.30/10,234.89 = 3,129.90/x
3. Step 3: Cross multiply
   6,825.30x = 10,234.89 × 3,129.90
4. Step 4: Simplify right side
   6,825.30x = 32,034,182.21
5. Step 5: Solve for x
   x = 32,034,182.21/6,825.30
6. Step 6: Final answer
   x = 4,693.45