Finding the Fourth Proportional to 12,410.56, 17,119.71 and 7,864.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,410.56 : 17,119.71 = 7,864.90 : x
2. Step 2: Convert to fraction form
   12,410.56/17,119.71 = 7,864.90/x
3. Step 3: Cross multiply
   12,410.56x = 17,119.71 × 7,864.90
4. Step 4: Simplify right side
   12,410.56x = 134,644,807.18
5. Step 5: Solve for x
   x = 134,644,807.18/12,410.56
6. Step 6: Final answer
   x = 10,849.21