Finding the Fourth Proportional to 219,494.82, 329,016.24 and 86,321.10

Step by Step Solution

1. Step 1: Write the proportion equation
   219,494.82 : 329,016.24 = 86,321.10 : x
2. Step 2: Convert to fraction form
   219,494.82/329,016.24 = 86,321.10/x
3. Step 3: Cross multiply
   219,494.82x = 329,016.24 × 86,321.10
4. Step 4: Simplify right side
   219,494.82x = 28,401,043,754.66
5. Step 5: Solve for x
   x = 28,401,043,754.66/219,494.82
6. Step 6: Final answer
   x = 129,392.77