Finding the Fourth Proportional to 259,667.62, 388,476.78 and 196,669.78

Step by Step Solution

1. Step 1: Write the proportion equation
   259,667.62 : 388,476.78 = 196,669.78 : x
2. Step 2: Convert to fraction form
   259,667.62/388,476.78 = 196,669.78/x
3. Step 3: Cross multiply
   259,667.62x = 388,476.78 × 196,669.78
4. Step 4: Simplify right side
   259,667.62x = 76,401,642,857.71
5. Step 5: Solve for x
   x = 76,401,642,857.71/259,667.62
6. Step 6: Final answer
   x = 294,228.61