Finding the Fourth Proportional to 12,355.71, 17,049.60 and 7,049.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,355.71 : 17,049.60 = 7,049.50 : x
2. Step 2: Convert to fraction form
   12,355.71/17,049.60 = 7,049.50/x
3. Step 3: Cross multiply
   12,355.71x = 17,049.60 × 7,049.50
4. Step 4: Simplify right side
   12,355.71x = 120,191,155.20
5. Step 5: Solve for x
   x = 120,191,155.20/12,355.71
6. Step 6: Final answer
   x = 9,727.58