Finding the Fourth Proportional to 412,578.01, 618,662.89 and 146,298.61

Step by Step Solution

1. Step 1: Write the proportion equation
   412,578.01 : 618,662.89 = 146,298.61 : x
2. Step 2: Convert to fraction form
   412,578.01/618,662.89 = 146,298.61/x
3. Step 3: Cross multiply
   412,578.01x = 618,662.89 × 146,298.61
4. Step 4: Simplify right side
   412,578.01x = 90,509,520,865.58
5. Step 5: Solve for x
   x = 90,509,520,865.58/412,578.01
6. Step 6: Final answer
   x = 219,375.53