Finding the Fourth Proportional to 288,982.38, 433,429.83 and 78,636.72

Step by Step Solution

1. Step 1: Write the proportion equation
   288,982.38 : 433,429.83 = 78,636.72 : x
2. Step 2: Convert to fraction form
   288,982.38/433,429.83 = 78,636.72/x
3. Step 3: Cross multiply
   288,982.38x = 433,429.83 × 78,636.72
4. Step 4: Simplify right side
   288,982.38x = 34,083,500,181.36
5. Step 5: Solve for x
   x = 34,083,500,181.36/288,982.38
6. Step 6: Final answer
   x = 117,943.18