Finding the Fourth Proportional to 219,496.82, 329,019.24 and 86,323.10

Step by Step Solution

1. Step 1: Write the proportion equation
   219,496.82 : 329,019.24 = 86,323.10 : x
2. Step 2: Convert to fraction form
   219,496.82/329,019.24 = 86,323.10/x
3. Step 3: Cross multiply
   219,496.82x = 329,019.24 × 86,323.10
4. Step 4: Simplify right side
   219,496.82x = 28,401,960,756.44
5. Step 5: Solve for x
   x = 28,401,960,756.44/219,496.82
6. Step 6: Final answer
   x = 129,395.77