Finding the Fourth Proportional to 701,658.56, 968,051.04 and 399,638.72

Step by Step Solution

1. Step 1: Write the proportion equation
   701,658.56 : 968,051.04 = 399,638.72 : x
2. Step 2: Convert to fraction form
   701,658.56/968,051.04 = 399,638.72/x
3. Step 3: Cross multiply
   701,658.56x = 968,051.04 × 399,638.72
4. Step 4: Simplify right side
   701,658.56x = 386,870,678,520.27
5. Step 5: Solve for x
   x = 386,870,678,520.27/701,658.56
6. Step 6: Final answer
   x = 551,366.01