Finding the Fourth Proportional to 13,271.72, 18,308.82 and 7,957.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,271.72 : 18,308.82 = 7,957.30 : x
2. Step 2: Convert to fraction form
   13,271.72/18,308.82 = 7,957.30/x
3. Step 3: Cross multiply
   13,271.72x = 18,308.82 × 7,957.30
4. Step 4: Simplify right side
   13,271.72x = 145,688,773.39
5. Step 5: Solve for x
   x = 145,688,773.39/13,271.72
6. Step 6: Final answer
   x = 10,977.38