Finding the Fourth Proportional to 219,109.05, 328,699.89 and 76,917.42

Step by Step Solution

1. Step 1: Write the proportion equation
   219,109.05 : 328,699.89 = 76,917.42 : x
2. Step 2: Convert to fraction form
   219,109.05/328,699.89 = 76,917.42/x
3. Step 3: Cross multiply
   219,109.05x = 328,699.89 × 76,917.42
4. Step 4: Simplify right side
   219,109.05x = 25,282,747,493.08
5. Step 5: Solve for x
   x = 25,282,747,493.08/219,109.05
6. Step 6: Final answer
   x = 115,388.88