Finding the Fourth Proportional to 206,342.89, 309,558.89 and 64,185.46

Step by Step Solution

1. Step 1: Write the proportion equation
   206,342.89 : 309,558.89 = 64,185.46 : x
2. Step 2: Convert to fraction form
   206,342.89/309,558.89 = 64,185.46/x
3. Step 3: Cross multiply
   206,342.89x = 309,558.89 × 64,185.46
4. Step 4: Simplify right side
   206,342.89x = 19,869,179,138.31
5. Step 5: Solve for x
   x = 19,869,179,138.31/206,342.89
6. Step 6: Final answer
   x = 96,292.05