Finding the Fourth Proportional to 971,401.36, 1,456,219.94 and 339,970.72

Step by Step Solution

1. Step 1: Write the proportion equation
   971,401.36 : 1,456,219.94 = 339,970.72 : x
2. Step 2: Convert to fraction form
   971,401.36/1,456,219.94 = 339,970.72/x
3. Step 3: Cross multiply
   971,401.36x = 1,456,219.94 × 339,970.72
4. Step 4: Simplify right side
   971,401.36x = 495,072,141,480.16
5. Step 5: Solve for x
   x = 495,072,141,480.16/971,401.36
6. Step 6: Final answer
   x = 509,647.36