Finding the Fourth Proportional to 686,156.54, 946,945.88 and 414,290.56

Step by Step Solution

1. Step 1: Write the proportion equation
   686,156.54 : 946,945.88 = 414,290.56 : x
2. Step 2: Convert to fraction form
   686,156.54/946,945.88 = 414,290.56/x
3. Step 3: Cross multiply
   686,156.54x = 946,945.88 × 414,290.56
4. Step 4: Simplify right side
   686,156.54x = 392,310,738,914.89
5. Step 5: Solve for x
   x = 392,310,738,914.89/686,156.54
6. Step 6: Final answer
   x = 571,751.07