Finding the Fourth Proportional to 219,185.57, 328,659.89 and 76,994.12

Step by Step Solution

1. Step 1: Write the proportion equation
   219,185.57 : 328,659.89 = 76,994.12 : x
2. Step 2: Convert to fraction form
   219,185.57/328,659.89 = 76,994.12/x
3. Step 3: Cross multiply
   219,185.57x = 328,659.89 × 76,994.12
4. Step 4: Simplify right side
   219,185.57x = 25,304,879,009.85
5. Step 5: Solve for x
   x = 25,304,879,009.85/219,185.57
6. Step 6: Final answer
   x = 115,449.57