Finding the Fourth Proportional to 288,667.89, 398,373.84 and 161,343.38

Step by Step Solution

1. Step 1: Write the proportion equation
   288,667.89 : 398,373.84 = 161,343.38 : x
2. Step 2: Convert to fraction form
   288,667.89/398,373.84 = 161,343.38/x
3. Step 3: Cross multiply
   288,667.89x = 398,373.84 × 161,343.38
4. Step 4: Simplify right side
   288,667.89x = 64,274,979,857.31
5. Step 5: Solve for x
   x = 64,274,979,857.31/288,667.89
6. Step 6: Final answer
   x = 222,660.65