Finding the Fourth Proportional to 710,732.72, 980,812.88 and 388,446.72

Step by Step Solution

1. Step 1: Write the proportion equation
   710,732.72 : 980,812.88 = 388,446.72 : x
2. Step 2: Convert to fraction form
   710,732.72/980,812.88 = 388,446.72/x
3. Step 3: Cross multiply
   710,732.72x = 980,812.88 × 388,446.72
4. Step 4: Simplify right side
   710,732.72x = 380,993,546,169.75
5. Step 5: Solve for x
   x = 380,993,546,169.75/710,732.72
6. Step 6: Final answer
   x = 536,057.42