Finding the Fourth Proportional to 712,152, 982,769.76 and 394,200

Step by Step Solution

1. Step 1: Write the proportion equation
   712,152 : 982,769.76 = 394,200 : x
2. Step 2: Convert to fraction form
   712,152/982,769.76 = 394,200/x
3. Step 3: Cross multiply
   712,152x = 982,769.76 × 394,200
4. Step 4: Simplify right side
   712,152x = 387,407,839,392
5. Step 5: Solve for x
   x = 387,407,839,392/712,152
6. Step 6: Final answer
   x = 543,996