Finding the Fourth Proportional to 12,348.72, 18,499.56 and 7,340.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,348.72 : 18,499.56 = 7,340.46 : x
2. Step 2: Convert to fraction form
   12,348.72/18,499.56 = 7,340.46/x
3. Step 3: Cross multiply
   12,348.72x = 18,499.56 × 7,340.46
4. Step 4: Simplify right side
   12,348.72x = 135,795,280.20
5. Step 5: Solve for x
   x = 135,795,280.20/12,348.72
6. Step 6: Final answer
   x = 10,996.71