Finding the Fourth Proportional to 711,345.59, 981,644.50 and 389,048.62

Step by Step Solution

1. Step 1: Write the proportion equation
   711,345.59 : 981,644.50 = 389,048.62 : x
2. Step 2: Convert to fraction form
   711,345.59/981,644.50 = 389,048.62/x
3. Step 3: Cross multiply
   711,345.59x = 981,644.50 × 389,048.62
4. Step 4: Simplify right side
   711,345.59x = 381,907,438,055.59
5. Step 5: Solve for x
   x = 381,907,438,055.59/711,345.59
6. Step 6: Final answer
   x = 536,880.31