Finding the Fourth Proportional to 12,995.55, 19,460.12 and 7,145.73

Step by Step Solution

1. Step 1: Write the proportion equation
   12,995.55 : 19,460.12 = 7,145.73 : x
2. Step 2: Convert to fraction form
   12,995.55/19,460.12 = 7,145.73/x
3. Step 3: Cross multiply
   12,995.55x = 19,460.12 × 7,145.73
4. Step 4: Simplify right side
   12,995.55x = 139,056,727.56
5. Step 5: Solve for x
   x = 139,056,727.56/12,995.55
6. Step 6: Final answer
   x = 10,700.33