Finding the Fourth Proportional to 339,871.89, 469,035.25 and 186,921.91

Step by Step Solution

1. Step 1: Write the proportion equation
   339,871.89 : 469,035.25 = 186,921.91 : x
2. Step 2: Convert to fraction form
   339,871.89/469,035.25 = 186,921.91/x
3. Step 3: Cross multiply
   339,871.89x = 469,035.25 × 186,921.91
4. Step 4: Simplify right side
   339,871.89x = 87,672,964,787.33
5. Step 5: Solve for x
   x = 87,672,964,787.33/339,871.89
6. Step 6: Final answer
   x = 257,958.86