Finding the Fourth Proportional to 945,439.89, 1,304,715.39 and 515,721.93

Step by Step Solution

1. Step 1: Write the proportion equation
   945,439.89 : 1,304,715.39 = 515,721.93 : x
2. Step 2: Convert to fraction form
   945,439.89/1,304,715.39 = 515,721.93/x
3. Step 3: Cross multiply
   945,439.89x = 1,304,715.39 × 515,721.93
4. Step 4: Simplify right side
   945,439.89x = 672,870,339,031.50
5. Step 5: Solve for x
   x = 672,870,339,031.50/945,439.89
6. Step 6: Final answer
   x = 711,700.81