Finding the Fourth Proportional to 287,329.72, 396,499.74 and 164,815.78

Step by Step Solution

1. Step 1: Write the proportion equation
   287,329.72 : 396,499.74 = 164,815.78 : x
2. Step 2: Convert to fraction form
   287,329.72/396,499.74 = 164,815.78/x
3. Step 3: Cross multiply
   287,329.72x = 396,499.74 × 164,815.78
4. Step 4: Simplify right side
   287,329.72x = 65,349,413,917.90
5. Step 5: Solve for x
   x = 65,349,413,917.90/287,329.72
6. Step 6: Final answer
   x = 227,437.02