Finding the Fourth Proportional to 10,308.50, 14,225.45 and 5,709.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,308.50 : 14,225.45 = 5,709.12 : x
2. Step 2: Convert to fraction form
   10,308.50/14,225.45 = 5,709.12/x
3. Step 3: Cross multiply
   10,308.50x = 14,225.45 × 5,709.12
4. Step 4: Simplify right side
   10,308.50x = 81,214,815.38
5. Step 5: Solve for x
   x = 81,214,815.38/10,308.50
6. Step 6: Final answer
   x = 7,878.43